By 74 I think the Chevs were alloy headed, Brownfields etc. I have never heard of an alloy head for a Rambler motor. Nor have I seen a 5l Rambler engine. Were they a destroked and short deck Rambler Rebel engine? If so they are heavier than a Chev. They can be made to go really well but nothing advailable now for them.
The Mopars used were short stroke 340s ofcourse but really did they survive that long?
All this hoo ha about weight. Where were the Fords? Tiny little engine compared with a Chev, even in Boss 302 form, though those Clevo heads would make them top heavy.
The first AMC comp. engnes were stroke 287s for the Trans-Am.
By the time Penske arrived they were allowig destroking.
Alloy heads were not allowed in the F-A series.
There were no U.S. after market alloy engines for any make till after the Formula A series died.
Gurney and I think Donovan has the first ones for Chevy.
Which style AMC blocks ran there, the first Nash based engine or the later one, thin-wall casting?
When AMC increased the size of the second gen. from 287-390 to 304-401, the deck was raised by a small amount.
Perhaps not down-under but there is quite a bit available for AMC engines now, including all alloy blccks.
Alloy AMC engines ran in Indy cars in the late seventies, after the Formula A series died.
By then sadly AMC was wrapping up its racing involvement.