LS7 Head Info Needed

[mockingbird812]

Pantera,

I realize that the casting symbol is usually found on SBs, but LS6 heads (291's) from 1970 had characteristic single humps in the casting flash line. The hump I was referring to is at the front of the head (facing the fan). It is a quick (although not conclusive) ID w/o looking inside the valve covers. I found it odd that Colvins does not call out this hump in the description of this head. One had it the other didn't. I just can't figure out why it has it.

Sam