Speaking of head's up racing. In the final round for E/ Stock class eliminations at the NHRA national event in Englishtown, NJ last summer, I had to run a 400 Pontiac Firebird 4-speed for the final, and won. 10.89 to a 10.97. A 302 against a 400 cu in big block.
FYI, Ben Wenzel was out testing last weekend and went 10.53 in D/stock. That's fast!
Pontiacs don't come in big blocks or small blocks (at least prior to corporate dictates in '81)...just Pontiac blocks
...which, of course, doesn't take anything away from overcoming a 98CI deficit