I have the rear suspension apart on my '72 240z and want to install a R/T mount. My car is stock type setup with a 2.8L engine and 5spd from a 280zx along with a R200 diff and no plans to install a V8 or anything. From what I have read I think I would be just fine with the traditional bump stop design and possibly cutting off 1/4 of an inch of the bump stop if I needed to. However the method of using the GM trans mount looks much better since it eliminates the bottom mount all together thus eliminating any possibly movement. My question is, would there be any negative effects on my stock style drive train by using the GM trans mount setup?

The GM mount changes the angle of the diff to one that is more driveline-friendly to the transmissions used with V8 swaps. If you are staying with the Nissan transmission, you will be better off going the bump stop method.

Thank you Arne. That is what I thought based on my reading but wanted to make sure before placing my order.