If you were to put a hybrid V8 head combo , it would not be street worthy. The deck of the block would be too weak.
There were a few different 12 port heads available thru the years.
Duggan was the first and they were made in Australia ( go figure).
Sissel and Deppe somehow worked together enough to buy the patterns. Sissel/ Kirby then made his own head, and so did Deppe.
These heads are hard to find. They also have a smaller chamber, so get a head before buying pistons.
To answer your post.
The 250 was built very tough, Crower rods, Ross pistons, prepped block, ARP studs and so on. It was built for dyno testing and I wanted it to live. Still had failures, that can be expected.
My 292 does not have those HD parts. With more testing of different parts, I will expect more performance. I am testing another theory now, been busy in the shop with it. This weekend will get it back out on the road.
Last edited by tlowe #1716; 06/10/10 08:37 PM.
