late model sportsman engine build

[dirty white boy]

new class starting up in my area and got 2 rolling chassis i need to use up and want to do it with mopar style so question is, tracks are from 3/8th to 1/2 mile dirt most with moderate banking! what would you build, how would you build it and why?? know its against rules but tech is sketchy at best, so roller cams and stroker cranks is viable options as most other will be cheating to. plenty of room for what ever headers and distributor and what not as well. so magnum? LA?? 89/90 LA rollercam???

Sportsman Engine Rules



1. Standard GM 350 production engine,or ford ,dodge with the same engine specs as chevy......as in cubic inch ,etc ....



2. Front spark plug inline with top ball join 1" tolerance or stock location .



3. Max. Overbore .060 GM #s 041, 186, 291, 461, 462, 492, Bow Tie out of the box OK, , no porting or polishing only machine work allowed is valve job, and head surfacing. Vortec, Bowtie Vortec, World Product Sportsman II 200/64cc, and Dart Iron Eagle Platinum 200/64cc allowed (World Product & Dart heads must be cut no less than 60cc combustion chamber)



4. Aftermarket Valve Springs OK (Two per cylinder - Max. 2.02 intake - 1.600 exhaust)



5. Three angle valve job OK (no titanium valves)



6. Forged or cast pistons, flat top or dished. May not protrude from cylinder bore. No domed pistons. Any type of piston rings, any type wrist pins, may balance.



7. Crank stock stroke 3.48'' and min. 48 lbs. Rods 6.0''MAX stock or steel rods OK.



8. Intake (ANY 4 BARREL INTAKE UNTOUCHED).



9. Adapter plates are allowed. May run 2'' spacer on 602 gm crate motor. May run 1'' spacer on performer 2101,7101



10. Carburetor: ANY 600 cfm or smaller. ANY 650 Carburetor allowed (choke horn may be removed.) Venturi and Base must be untouched!!!



11. Any fuel pump



12. HEADERS ANY (NO TRI-Y'S)



13. Solid or hydraulic cams and lifters with Roller rockers Ok, Screw in studs OK. Cam driven by chain only.



14. Wet sump only. Internal pump only, Oil cooler OK.



15. Stock types or MSD type ignition Ok.

 

[dirty white boy]

like to fit these rules to for a touring series in south east...
CARBURETOR:

A. ONE FOUR BARREL is PERMITTED.

B. DOMINATOR CARBURETORS ARE NOT PERMITTED.

ENGINE:

A. 365 CUBIC INCHES MAXIMUM

B. CAST IRON BLOCK

C. HIGH PERFORMANCE CAM SHAFTS PERMITTED

D. ANY HYDRAULIC CAM PERMITTED

E. ROLLER CAM PERMITTED (MUST ADD 50 LBS)

F. ANY WET OIL PANS PERMITTED.

G. BALANCING PERMITTED.

H. ENGINE MAY BE CROSSED FROM ONE MANUFACTURER TO ANOTHER.

I. DRY SUMP PERMITTED.

J. FORD (S374) SEALED RACING ENGINE IS PERMITTED.

L. GM PERFORMANCE {CT525 - 376 Cubic Inch} SEALED RACE ENGINE IS PERMITTED.

ENGINE PLACEMENT:

A. ENGINE MUST NOT BE MORE THAN 2" FROM CENTER OF FRAME RAIL.

B. ENGINE SETBACK WILL BE 6" CENTER OF TOP BALL JOINT TO MOST FORWARD SPARK PLUG. (1/2” VARIANCE)

C. (CT525-376 Cubic Inch-Tolerance will be allowed).

HEADS:

A. (NO CC LIMIT) on cast iron heads. (Cast iron ONLY).

B. High Performance valve springs & retainers permitted.

C. Titanium retainers are permitted.

D. Needle bearing rocker arms are permitted.

E. CHEVY 23 DEGREE HEADS ONLY. ANGLE HEADS PERMITTED.

F. Screw in studs & guide plates are permitted.

G. 10 degree Ford heads permitted. (MUST ADD 50 LBS)

H. National late model sportsman Spec Heads permitted.

I. PORTING & POLISHING PERMITTED ON STEEL HEADS ONLY (NO Extra Weight Required)

J. BRODIX HEADS PERMITTED.

The following part numbers ONLY:

FORD PART #(SPFO)

MOPAR PART #(SPMO)

CHEVY PART #(SPCH)

CHEVY PART #(SURP) (MUST ADD 60 LBS.)

INTAKE MANIFOLD:

A. ALUMINUM INTAKE PERMITTED.

WEIGHT RULE:

A. BASE WEIGHT 2400 lbs

B. 1 LB PER LAP BURN OFF

C. GM 602 CRATE (150 LBS weight break)

D. GM 604 CRATE (150 LBS weight break)

E. CT525 (2400 LBS)

(SUMMARY OF RULES FOR STEEL HEAD AND ALUMINUM SPEC HEAD ENGINE RULES)

(ANY FORM OF GETTING TO 365 OR LESS IS OK)

If the driver claims Port Polish dry sump and roller, it is easy for Tech Inspector of said car makes weight.

In most cases the Tech Inspector can check these visibly, even the roller can be seen from oil returns in head.

If for some reason Tech Inspector is unable to see, the intake may have to be removed.

 

[Krooser]

Well if you don't have to follow the rules...

340 +.060... W-2 heads w/8mm or 5/16" valves... GOOD springs... single plane intake... Jones cam (www.jonescams.com)... 12-1 compression on gas... RaceTec pistons... if you stroke it use a 3.79 Molnar crank/rods (get it as light as possible... Tom Molnar will not lighten it... it will weigh about 67 lbs)... MSD dizzy... Champ pan and pickup...

The chassis will be more important than the engine IMHO.... dirt or pavement?

 

[dirty white boy]

Well if you don't have to follow the rules...

340 +.060... W-2 heads w/8mm or 5/16" valves... GOOD springs... single plane intake... Jones cam (www.jonescams.com)... 12-1 compression on gas... RaceTec pistons... if you stroke it use a 3.79 Molnar crank/rods (get it as light as possible... Tom Molnar will not lighten it... it will weigh about 67 lbs)... MSD dizzy... Champ pan and pickup...

The chassis will be more important than the engine IMHO.... dirt or pavement?

dirt! chassis is a 2006 BWRC with '12 updates with a 1997 BWRC as a back up car on standerd afco blue shocks ,.. no light weight/ball spline trans or low inertia Q/C! more of a economy late model class since the crate class is spending as much on shocks and light weight as supers are on engines! the touring series has tech,..but my local track dont! first rules from local track!!