Awesome Original Owner '67 400HO/4-sp GTO

[Too Many Projects]

I understand the stroker kit. I went thru this with my LS5. The way they build engines today is very different than 50 years ago. Flat top pistons help the flame travel and not trap hot spots causing detonation, like a high dome piston does. With zero deck height being the goal, MANY blocks get machined to match the stock pistons and with Chev's, that means losing the original broach pattern and stampings. It may not have adversely affected the Pontiac block, but my engine builder said he could accomplish the same thing by ordering a stroker kit and specifying the wrist pin location to get zero deck and not machine the block. NONE of the changes to my LS5 are permanent, as mechanical parts are "bolt in". If that Pontiac had a stock cam, no one listening to it run would have a clue that it had a stroker reciprocating assembly inside.