Heads are totally rebuilt (done right) and the block is a 57" 265 to be exact. I haven't pulled the old heads off the block yet to eyeball it, figured someone knows off the top of their head (pun).

Thanks in advance,

The one who dies with the most toys probably led an interesting life...

 

Off the top of my bald head(pun back at ya-LOL)I am thinking given the bore size and the chamber of the heads size the valves would hit.