12's from a 340 naturally aspirated.

I have to say that I don't think the issue is with motor. 2.40's 60' is the issue. I have seen very few people who can consistently launch a stick car. You cut a tenth off your 60' it's two tenths at the top. I average 1.80 60' on a f70 14 redline bias ply. 6" wide. Other than both being small blocks our combos don't compare, but my point is 2.00 60's are not out of the realm of possibilty for your combo. How's your et after shaving 8 tenths? Until you can 60' you stick car at your horsepower level you going to go in circles. With a stick you have to drive it like you STOLE it!!!