I have someone interested in purchasing a T-18 from me and installing it into a 1981 CJ-7 that currently has an SR-4 transmission. We need to know what needs to be done to fit it in. The T-18 is still installed in the jeep right now. Here are it's details without me taking any measurements. The T-18 case itself originated in a 1975 CJ-5. The gears installed are from a 2wd Ford pickup (6.32) The length of the input shaft is such that it reaches through a standard Chevy bellhousing perfectly. The front bearing retainer currently installed fits the chevy bellhousing big hole perfectly. I had to make modifications to the bellhousing to bolt them together. I hope these "clues " help. Is this as simple as using a T-150 bellhousing?