My guess would be a combination of weight transfer (springs and shocks) as well as tires.

What springs and shocks do you have - this might tell part of the tail.

Goodyear Wranglers are unforgiving truck tires with a weight rating that reflects that(what does the side wall say). They are horrible tires on a truck and even as recaps, I wouldn't touch them for a 2400 pound car. I've had them as OEM tires on several pickups and can't wait to get rid of them, usually LONG before they wear out. The compound gets so hard that they become rigid. Take a look at Tire Rack for ratings. This, since I'm not sure which one you have, this is for Wrangler RT/S: http://www.tirerack.com/tires/tires....rangler+RT%2FS

People generally dislike them - with a passion

And when it's all over, any car to launch well like a strip car needs a fair amount of dial in and often it is trial and error. and a short wheelbase, very light car such as a '32 often needs even more work.