Traction issues

The 904 has a lower 1st gear too. So you have a torquey cam/engine, lower first, a slippery convertor, and a light car. If you are building a G machine with sway bars and low profile tires, I would suggest sending the convertor back and getting it tightened up to stall at 2500 and learn to peddle it, as these drag suspensions will hurt overall handling.