Scott, I know what you mean. Actually, Q has some good ideas on getting a little more from your OHC. and I'm sure you've been all over the OHC board.
I have to admit, my 67 Sprint-6 stock was nothing to scoff at! I beat up on most V8's in the area at the time... and it really pissed them off to find out it was a stock 6!
Some day I'll get another Sprint to play with, but still wont have the money to super charge it like Brad did!