I just ordered a Lenco ST1200 and will be starting the mock up this weekend. I am not sure how close the two transmissions measure.

A Lenco ST1200 4-speed with reverser is 28.5" from mating surface to output seal. The shifter can be located at 14, 21, or 28".

What ratio's are you looking at running? Clutch setup? Will your see any street duty? Ours will!