408 Truck Engine Build
COMPRESSION RATIO CALCULATOR
Static and Dynamic Compression Ratio
(Considers Cam Timing and Rod Ratio
CALCULATED DATA
Cylinder Head Vol (cubic in.)
3.782
Piston Head Vol (cubic in.)
1.525
Gasket Thickness (in.)
.030
Swept Volume (cubic in.)
50.769
T.D.C. Volume (cubic in.)
5.509
Gasket Volume (cubic in.)
0.443
Deck Clearance (in.)
Note: Neg. number above deck, Pos. number below deck
STATIC COMPRESSION RATIO
10.216
Intake Closing Point (degrees) ABDC @ 0.050 lift plus 15 degrees
DYNAMIC EFFECTIVE COMPRESSION RATIO
8.817
HOWARD'S CAMS 318-340-360 CHRYSLER MOPAR 277/283 .531"/.547" HYD CAMSHAFT KIT:
HOWARDS PART #SK710581-10
All Howards™ Cams are ground at Howards Cams™, not reboxed like some cam companies. All Howards™ Cams use the highest-grade race quality cores available. All hydraulic and mechanical flat tappet camshafts are 100% Rockwell checked and Parkerized to ensure the highest quality control standards available anywhere. Howards™ Cams are manufactured on dedicated high precision cam grinding machines. Most Howards™ Cam and lifters are packaged and shipped in our unique, hard, high impact plastic reusable cases. This ensures that the high quality camshaft that went into the case comes out in the same condition, when delivered, as when it was packed.remium materials and advanced engineering to deliver unbelievable power. These cams offer significant advantages of additional lift and more power compared to flat tappet designs. The latest in lobe design produces better throttle response and top end horsepower. Designed with fast ramp speeds to give you the most power possible while maintaining the easy maintenance of a hydraulic cam.
CAMSHAFT SPECIFICATIONS:
Chrysler Small Block LA 273-318-340-360 1964-2003 Hydraulic Flat Tappet Camshaft
: Lopey idle, Strong mid range. Good throttle response. 2400-6200 stall
UPC: 840793114917
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 2,600-6,200
Intake Duration at 050 inch Lift: 230
Exhaust Duration at 050 inch Lift: 236
Duration at 050 inch Lift: 230 int./236 exh.
Advertised Intake Duration: 277
Advertised Exhaust Duration: 283
Advertised Duration: 277 int./283 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.531 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.547 in.
Valve Lift with Factory Rocker Arm Ratio: 0.531 int./0.547 exh.
Lobe Separation (degrees): 110
Computer-Controlled Compatible: No
HOWARDS HYDRAULIC LIFTERS
#911711 INCLUDED WITH KIT
1978 360/408” Block
Bored .030” /Squared
Notched for rod clearance
Oil Crossover Tube Modification
New Freeze plug set
Keith Black pistons – KB356-030
Rotating Assembly
Chamfered Crank Shaft
Rod rotating-513
Rod rotating-513
Rod bearing 46.5
Rod bearing-46.5
Oil allowance-6
Piston & Pin-591.5
Locks (1 set) X
Rings (1 set) 56.5
Rod reciprocating- 208
Bobweight total- 1981
Note: 50% Reciprocating, 100% Rotating
Keith Black Pistons KB356-030
Stock rods
ARP main bolts
ARP rod nuts and studs
Clevite rod bearings
King main bearings
Reproduction truck oil pan
Modified Dipstick Tube
Melling HV Oil Pump
Wix Oil Filter
Summit SFI harmonic balancer #A640195
587 Iron Heads Nicely Ported
Stainless Steel Valves
2.02 intake/1.66 exhaust
Bronze valve guides
Adjustable roller rocker arms (unknown brand)
Crane Cams rocker arm adjuster screws #crn-99802-16
Custom Made Ball & Cup Pushrods
Cometic Head gaskets #245-C5633-030
Howard’s Cam & lifters #CL710581-10
Hydraulic flat tappet 230/236, 277/283, .531”/.537”, 110+4 L/C
Double roller timing chain & gear set
Timing chain tensioner DCC-5007709
Stock Mopar Distributor
Standard Dist. Cap & Rotor Plug wires
Champion spark plugs RN12YC
Hardened Dist. Gear Drive DCC-3690715
Hardened fuel pump eccentric
Carter Fuel Pump #M6866
Mickey Thompson Valve covers
Edelbrock Performer 318/360 Intake Manifold
Hollley 670 Street Avenger Carb
1978 360 block bored .030”, cylinders notched for rod clearance, and block was squared. I also installed the oil crossover tube for better oiling.
The heads have been ported nicely, which look to be done professionally to a stage 2 or 3 level. They have stainless valves, bronze guides, and heavy duty springs to match the Howard’s camshaft. .030” Cometic sheet metal re-usable head gaskets were installed. The roller rocker arms I’m not sure what brand they are but might be Pro-forms. I up-graded the adjuster screws to Crane Cams brand and cut the ball and cup push rods to length.
I port matched the intake manifold to the head intake ports and the exhaust side to a set of Flowtec headers.
The crankshaft (rotating assembly) was balanced and was told by the Machine shop owner it looked like a chamfered Scat cast crank.
quench .036”
Rod and main bearing clearance .002-.003”.
Valve lash was set at ¾ turn.
Camshaft was installed straight up with a 3 way timing gear adjustment. The motor was primed and has 75 lbs. oil pressure with Valvoline ZR-1 10W30
It was run long enough to break-in the camshaft.
The factory distributor will need to be re-curved or an after market one can be installed.
$4000 or best offer
Located in Mid Michigan 48661
Send a pm
COMPRESSION RATIO CALCULATOR
Static and Dynamic Compression Ratio
(Considers Cam Timing and Rod Ratio
CALCULATED DATA
Cylinder Head Vol (cubic in.)
3.782
Piston Head Vol (cubic in.)
1.525
Gasket Thickness (in.)
.030
Swept Volume (cubic in.)
50.769
T.D.C. Volume (cubic in.)
5.509
Gasket Volume (cubic in.)
0.443
Deck Clearance (in.)
Note: Neg. number above deck, Pos. number below deck
STATIC COMPRESSION RATIO
10.216
Intake Closing Point (degrees) ABDC @ 0.050 lift plus 15 degrees
DYNAMIC EFFECTIVE COMPRESSION RATIO
8.817
HOWARD'S CAMS 318-340-360 CHRYSLER MOPAR 277/283 .531"/.547" HYD CAMSHAFT KIT:
HOWARDS PART #SK710581-10
All Howards™ Cams are ground at Howards Cams™, not reboxed like some cam companies. All Howards™ Cams use the highest-grade race quality cores available. All hydraulic and mechanical flat tappet camshafts are 100% Rockwell checked and Parkerized to ensure the highest quality control standards available anywhere. Howards™ Cams are manufactured on dedicated high precision cam grinding machines. Most Howards™ Cam and lifters are packaged and shipped in our unique, hard, high impact plastic reusable cases. This ensures that the high quality camshaft that went into the case comes out in the same condition, when delivered, as when it was packed.remium materials and advanced engineering to deliver unbelievable power. These cams offer significant advantages of additional lift and more power compared to flat tappet designs. The latest in lobe design produces better throttle response and top end horsepower. Designed with fast ramp speeds to give you the most power possible while maintaining the easy maintenance of a hydraulic cam.
CAMSHAFT SPECIFICATIONS:
Chrysler Small Block LA 273-318-340-360 1964-2003 Hydraulic Flat Tappet Camshaft
: Lopey idle, Strong mid range. Good throttle response. 2400-6200 stall
UPC: 840793114917
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 2,600-6,200
Intake Duration at 050 inch Lift: 230
Exhaust Duration at 050 inch Lift: 236
Duration at 050 inch Lift: 230 int./236 exh.
Advertised Intake Duration: 277
Advertised Exhaust Duration: 283
Advertised Duration: 277 int./283 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.531 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.547 in.
Valve Lift with Factory Rocker Arm Ratio: 0.531 int./0.547 exh.
Lobe Separation (degrees): 110
Computer-Controlled Compatible: No
HOWARDS HYDRAULIC LIFTERS
#911711 INCLUDED WITH KIT
1978 360/408” Block
Bored .030” /Squared
Notched for rod clearance
Oil Crossover Tube Modification
New Freeze plug set
Keith Black pistons – KB356-030
Rotating Assembly
Chamfered Crank Shaft
Rod rotating-513
Rod rotating-513
Rod bearing 46.5
Rod bearing-46.5
Oil allowance-6
Piston & Pin-591.5
Locks (1 set) X
Rings (1 set) 56.5
Rod reciprocating- 208
Bobweight total- 1981
Note: 50% Reciprocating, 100% Rotating
Keith Black Pistons KB356-030
Stock rods
ARP main bolts
ARP rod nuts and studs
Clevite rod bearings
King main bearings
Reproduction truck oil pan
Modified Dipstick Tube
Melling HV Oil Pump
Wix Oil Filter
Summit SFI harmonic balancer #A640195
587 Iron Heads Nicely Ported
Stainless Steel Valves
2.02 intake/1.66 exhaust
Bronze valve guides
Adjustable roller rocker arms (unknown brand)
Crane Cams rocker arm adjuster screws #crn-99802-16
Custom Made Ball & Cup Pushrods
Cometic Head gaskets #245-C5633-030
Howard’s Cam & lifters #CL710581-10
Hydraulic flat tappet 230/236, 277/283, .531”/.537”, 110+4 L/C
Double roller timing chain & gear set
Timing chain tensioner DCC-5007709
Stock Mopar Distributor
Standard Dist. Cap & Rotor Plug wires
Champion spark plugs RN12YC
Hardened Dist. Gear Drive DCC-3690715
Hardened fuel pump eccentric
Carter Fuel Pump #M6866
Mickey Thompson Valve covers
Edelbrock Performer 318/360 Intake Manifold
Hollley 670 Street Avenger Carb
1978 360 block bored .030”, cylinders notched for rod clearance, and block was squared. I also installed the oil crossover tube for better oiling.
The heads have been ported nicely, which look to be done professionally to a stage 2 or 3 level. They have stainless valves, bronze guides, and heavy duty springs to match the Howard’s camshaft. .030” Cometic sheet metal re-usable head gaskets were installed. The roller rocker arms I’m not sure what brand they are but might be Pro-forms. I up-graded the adjuster screws to Crane Cams brand and cut the ball and cup push rods to length.
I port matched the intake manifold to the head intake ports and the exhaust side to a set of Flowtec headers.
The crankshaft (rotating assembly) was balanced and was told by the Machine shop owner it looked like a chamfered Scat cast crank.
quench .036”
Rod and main bearing clearance .002-.003”.
Valve lash was set at ¾ turn.
Camshaft was installed straight up with a 3 way timing gear adjustment. The motor was primed and has 75 lbs. oil pressure with Valvoline ZR-1 10W30
It was run long enough to break-in the camshaft.
The factory distributor will need to be re-curved or an after market one can be installed.
$4000 or best offer
Located in Mid Michigan 48661
Send a pm
