I'm sorry. I miust have been half asleep when I answered. The Bellhousings have the same bolt pattern at the tranny end. Different at the engine end. The t-case bolt patterns are different. The R151F uses the 4cylinder forward shift t-case only with a 23 spline input in place of the normal 4cylinder 21 spline shaft. The R150F uses a chain driven t-case with 23 spline input.
sorry for the confusion.
ccannon
