By a strange coincidence the fat intake flange method of port raising was done to my race engine in the 80’s.

Back before aluminium heads were available for 440 engines it was the only way forward.

The Ovalport intake was developed by Mother Mopar in the 60’s too.

I have here a set of Big block heads with that same design for a Nascar development engine.

Ovalport IN, D-port OUT... beer

All that is Old is NEW again... iagree

D-port exhaust Weslake 426 D5ish.jpg440 ovalports.jpg
Last edited by Gtxxjon; 10/23/21 10:21 AM.
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...