Currently on the Brock wagon, while I'm waiting for a 425!

It's got too much compression to run on fuel. The heads have had that much off them, that it's got 1/8" washers under the rocker supports, and the manifold is metal to metal on the valley ends of the block. It was all done prior to my ownership, and they're all the original parts (especially the modded intake) so I didn't want to change them. Plus it's pretty hard to find a good pair of VL heads that aren't cracked.
A mate went through 8 heads to get 2 good ones.