Quote:
An honest 425 horse on a legit dyno with a 10:1 383, exhaust manifolds, iron heads, and that intake is no easy feat...Not saying it can't be done, but it won't be like falling off a log. 
MB
its not like falling off a log......but is definately doable.
my 383.....
.030 over, TRW's, 9.8 actual CR, RPM intake, pocket ported 346's(about 260cfm), Holley 750 carb, HP manifolds, custom solid lifter cam(.550 lift)........made right about 420hp at 6300rpm on pump gas.
in retrospect, i think the cam had a tad too much duration as the TQ number was only a bit over 420 ft/lbs.
i think a little smaller cam would have boosted the tq numbers in the mid-range.....and may have carried that up into the upper rpms well enough to yield a few more HP as well.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
| 
