This IS what is going into my 509" and just wanted speculation on how well it will work.

Cam, gen6 roller , 570/580 with 1.7rr [email protected] 230int 236exh 114lsa
was told it would work with stock rollers with a powerband of 2000-5200
so long as pushrod and rocker geometry was correct.

Will the 114lsa prevent reversion (cam is not THAT big ) or is there still that possibility?

springs 1.540 dia 140lbs at 1.940 and 425lbs at 1.250

I also have stock HP500 springs(150/440? ),
Doug tested a few of them and they were all 150lbs at seat.
They were higher than what I wanted to use.

stock GM roller lifters off my 502.

Hardin SS (GLM) aluminum manifolds, 4" riser , 4" thruhulls with about a 6" drop from riser to tips..

Edelbrock Vic Jr

HP500 carb

HP500 heads

Looking for 450hp around 4600-5000rpm?

Are these the long or short risers? I would only use the long risers with no diverters.

short risers , no diverters, no silent choice,.

going to make that power no problem, if you still have the alpha...won't last to long I'm thinking....Rob

Sell the risers you have and get long ones.

Doug who?????????????