The average 408...
thats looks like stock intake and exaust manifold #'s. according to your VE.
what carb?
Did you port the heads?
whats the cam @ .050"? high 240s? if you care to share.
did you fix that lean problem?
As Darth Vader would say... Impressive, Most Impressive.
The heads were ported by Dwayne Porter, He built the motor for hi 68 Satellite in the early 90s and ran 11.60s @115mph with it @3600lbs
* 1973 340 block
* decked to +.020 deck height(pistons above deck)
* bored .030 over
* Ross flat tops with max weight removal option*** and .927 pin bores* B&B tool steel wrist pins, 2.500 X.927 X .090 wall(piston and pin 525g)
* OE rods bushed to .927, fully polished, resized, lightened, ARP bolts
* OE steel crank( reground, strokes equalized, indexed)
* Milodon deep pan
* Melling oil pump
* double roller timing set
* Crower 262/265 @ .050, .575/.585 solid lifter cam
* Crower lifters
* ported 587 heads with MP 2.02/1.60 valves, milled for true 11:1 CR flow 260/173 at .600 lift
* bronze guides and hardened exhaust seats
* Crower dual springs
* Comp 10deg retainers and machined locks
* Edelbrock victor intake, cleaned up plenum Proform 830cfm carb.
* Harland Sharp 1.5 roller rockers and HD thick wall shafts
* Crane pushrods
* MP moly coated fuel pump eccentric
* MP OEM replacement 340 damper