Originally Posted By W5DART66
They did the head like a hemi

Has threaded hole in the deck and it’s on bore center line.

This is not how a R3 small block was done so I have no clue what they where doing with this head.

Yep, on the r3 18 bolt patterns,the smaller upper studs are not central to the bore..but i *think* they are on the bottom row however. I cant remember