I have an 87 Monte Carlo SS. Originally it came stock with a 200r4. I am putting a small block 350 in it with a 350 Turbo tranny. I've been told the transmission mounts are not in the same spot, therefore I had to buy a different crossmember. I ordered the G-Body crossmember offered by Jegs that is a stock replacement for 78-87 GM G Body with a 350 Turbo. After trying to install the crossmember, it will not fit. The bolt holes do not line up and it doesn't sit square or level. I have called Jegs back and they keep saying that it should work. They are already mailed me a 2nd one and this one also does not line up correctly.

Has anyone else had this problem? Does anyone know if there is a difference in the years of Monte Carlos frames?