Originally Posted by ImBack
Originally Posted by novaman408
Is there enough material in the block when using the aftermarket mains it's not too weak? I'm thinking about a .030 with a 4" stroke for a 408(I believe) currently running a 383 with 6" rod, 13.5 comp, lunati 618 roller and 215 RHS heads and really like the combination. Runs 6.50's in the 1/8 in 2600lb car, I feel like a few more cubes would help and i have a spare 350 block in the garage just waiting for a build, and that would be worth about 20ci and be an interesting combo to put together. I dont really hear too much about them and was worried there might be a reason. Thanks for the input,
Maybe a head change?My 6" rod 383,13.5 comp.,dart 215 iron eagle platinums,with a Howards 555 lift flattappet cam on alky made 586 hp. at 6600,510tq. at 5000 and went a 6.36 best in my 2800# malibu.I think your cam is too much for those heads??
I am running(last year) a 383 ..6 inch rod .. 13.4 cr ..634 lift 272 duration roller ..hurricane intake..850 carb...1 3/4 headers...victor jr 215 heads 64cc in 2400 lb car @2300 feet made 565 hp...cam wasn't a issue for me the heads and intake were...this year i changed the block to a dart and changed the heads to afr 210 competetion heads opened up and a super victor intake that was ported by a exelcellent porter with a 950 carb and ceramic coated the headers hoping for 630-650 hp on the dyno