yes... the 4l80e since you are going to be fabbing up stuff to get the ls1 in there , you might as well get the best.
the 4l80e is built from alot of the same parts that the th400 is made of, basically think, strong as a th400, electronically shifted, and has an overdrive...
the 4l80e is built from alot of the same parts that the th400 is made of, basically think, strong as a th400, electronically shifted, and has an overdrive...