My moparmate had an ex engine-masters 470ci with 572-13 heads.

They were designed for the 4.500 bore but were fitted to a low-deck 400, 4.375 bore with a 470ci stroker-crank.

I assume they made some for the 4.250 bore 383 cube engines and moved the valves inwards to miss the bores?

Good for 1000hp 'they say' my mates 470 cube made 700 N/A... drive

Last edited by Gtxxjon; 10/28/21 12:30 PM.
Carpe diem, quam minimum credula postero, thanx Horace!

There’s no point trying to fix stuff that ain’t broke,,, 'but if ain’t broke',,, you is not trying hard enough...