Andy,thanks for the reply. The engine presently has a comp roller 275/282 108ls 660 lift and it peaked at 6000 with 636hp and 700ft lbs at 3200. The reason i asked is because I thought it should have been higher.I think the manifold is the restriction but its in a 64 max wedge car and have to keep it for appearance.I noticed all catalog cams are ground on a tight lsa 105 to 108 and starting to wonder if with strokers that the lsa shouldnt be wider like 112 to 116.There was no sign of reversion it just didnt like rpm.Kind of like your 470 build more questions than answers although I think you have answers I dont.
Anyone with ideas please jump in.
Also the heads have not been ported.
Joe