ke55 5sp is easiest. Straight bolt in. ke70 will also go but you have to cut the shifter hole back a bit in the tunnel (not hard), and make sure you get the bracket that goes between the g/box crossmember and the g/box. Also some had a coarse spline output shaft, and some are fine spline, you may have to switch yokes. But once the 5 sp is in it should do 100 easy.