My 408 has been 10.70 in my 3150 lb. Dart.. 539 hp. 502 tq. on dyno .. 408.. 4 inch stroke R3 Block, 9 1/2 to 1 compression for pump gas, out of box Indy 360-1 heads and intake, 600 lift mechanical cam. 1 7/8 inch headers, AED prepped 750 HP carb. easy low 10s / high 9s with more compression, roller cam and a little head work. I am very impressed with the torque from the 4 inch stroke, I went from a 4.88 gear to a 4.10 and my 60 fts stayed the same. I went 10.40 with a 5.9 Magnum block, 30 over , 590 lift cam, 11 1/2 to 1 compression , W2 heads, Victor W2 intake, 750HP carb, 1 7/8 headers 549 hp. 450 tq. on dyno. I am redoing it now for lower compression/ pump gas expecting between 500-520 hp. Will be a backup motor still expecting high 10s. Both combos ran thru mufflers and with a 904 and 4900 Stall Ultimate prepped 8 inch converter , car is throttle stopped down to run 11.50s.
Thread hijack!!!...Nice car...always liked it! Back to the orig post...based on what you have for parts, I'd go get a junkyard Eagle 5.7L and retrofit as you like to reach your goals. Go visit the gen3 Forum and digest some of that IMO.
