Originally Posted by Grizzly
I recall when the OEM's went roller the commonly quoted number was 15 to 20 hp gain.

Those numbers are feasible for mass production but, for the $800 to $1000 investment to convert, I've always thought more power could be found else where and still be F.A.S.T. legal. twocents

For $1000 and just going off your signature, I'd ditch the 14's and go with 15's to increase your contact patch and you might still have money left over for fiberglass fenders.


15" rims are not legal with a 383 build. Only available with Hemi in 68. Fiberglass is definitely not legal.
I have maybe 100 lbs left that I can pull off the car, and a better ignition system wouldn't hurt, but generally I think I have a good package.

Bill

1968 Road Runner 383 727 3.91 8 3/4 3520 with driver 11.04 @ 124.26 with 1.67 60’
Done on G70-14 redlines thru factory manifolds New quickest ever 383 build in FAST.
10:1 451” replaced with 14:1 499”.