Shot in the dark!

[tater_51]

It's probably been 5-6 years since I posted a photo of this 67 block.  It's kind of a mystery, but always hoped someone might know it's origin.  Thought I'd try it again.  Came out of a street rod about 15 years ago.  Had S7MS intake, cobra valve covers, 6M22 heads, LeMans camshaft, all hipo internals, hipo pump (water), distributor, everything pretty much date matched.  The block's cast date was ground off and the block was stamped on the boss next to the water pump (see photo's).  I had papers with it dating back to machine work in the early 90's but no help.  7B14 machine date, 7B15 assembly date.  Maybe someone recognize the stamping?