Redoing my 572's. Tall deck, 4.560 bore, 4.375 stroke, 10.0-1 compression, [email protected] [email protected] .632 lift .632 lift 112ls hydraulic roller, promaxx 317 by Valeko flow 375 @.650, single plane intake with 1050 dominator. Will dyno one of them, what will they make??

Im not a pro guessing hp but i will say 720 hp!

Rob where you dynoing at? What cc did your intakes end up at. I would guess around same 725 range at around 5,800 or so. You using 1.7 rockers. I'd think that engine would like a little more cam and carb but you'll have good power without valvetrain issues. At the end of the day that's all that really matters.

740 with dyno headers is my guess.make sure to let us know your results.

What intake? Also did jim do any work to those also.

738@6000 safe tune, 745 lean and mean

this ^^^^

1.7 rockers, intakes are from my zz572 motors that gm rebrands. Jim said they look like a Dart or a Merlin maybe. Valeko has the intakes manifolds so he can port match them to the heads. The intake is for a 4150 carb, but we are using an open style 2 inch adapter to get us to a 4500 1050 dominator. Valeko is also porting the intake to to this spacer and actually doing some custom work with the spacer so it's sort of a hybrid between an open style spacer and the 4 hole hvh style. Jim said the spacer will act like a mini tunnel ram and create more volume. I am looking for dyno suggestions. I was going to go to Dick at More Power in Sparta MI because it's just down the road and Dick is a nice guy. But Valeko said his dyno is a little stingy.... Jim thought Smitty might be interesed??

Tom Earhart for the dyno. PM me if you need contact info. Jim knows him very well.

Rob, dick at more power is a great guy and facility to dyno and that's actually why I asked cause I know his numbers typically come in lower than others but who cares. Main thing is you get it tuned right. Toms a good friend of Jims and a good option also. If jims helping you with it and going to be there while dynoing then have I'd tend to leave it up to him. More power has always been more convenient for me as I lived right nearby and practically lived their at one point.