I saw your exhaust question... but wasnt sure what you were asking ? (valve/rocker/manifold related?)

Only thing im sure of is that the exhaust flange on the head is the same as any other BBC... so factory manifolds will bolt right on.

wondering about exhaust compatibility too. I’m sure it’s googleable on a 496/8.1 discussion though.

On an 8.1 the bolt pattern is the same but the threads are metric.

Very cool informative thread!

Agreed 100%... and knowing what I now know about these engines... baffles me why more guys haven't figured it out and adopted the platform. It is CLEARLY far superior to previous BBC generations in every way. This is partly why I bought two of them... I wanted to grab a spare before someone figures out the value and gobbles them all up.

"Two is one and one is none" lol

Also FYI to anyone considering one of these engines... make sure you have a transport stand that is tall enough to keep the drain plug off the floor. The oil pans are massive and deep. I had to add a 2" framework under mine this morning because I didn't trust flimsy castors or small jackbolts.

Just found the 4.750" crank for these engines... lol

This would make 565 cubic inches... but adds $1k+ add'l expense.

https://www.summitracing.com/parts/sca-481029

Outside of gas generators and the like, it looks like these have a good foothold in school bus fleets.

Personally, I would love one of these in my 2500 Suburban. Being a gas truck, converting wouldn't be too hard with exception of the oil pan.

In bold answers my question. The differences you mention of the psi head are so different - chamber - valve angles - etc etc - I figued good chance the exh port locations and etc could be different too, as most times they are with any if those changes.

Probably not hard to find if someone really looked.

Actually not much info out there. The drag racers don’t seem wise to these. They wrote the platform off long ago.