1975 250 gp engine in1974 250cr mag frame

hello, new to your forum. am building a 1974 250 cr mag. installing a 1975 250 gp engine in the mag frame. was wondering if someone else here has done this swap? would like to hear from them. need ideas about exhaust pipe and other issues. I had a complete 1975 250 gp. bought a 250cr mag frame. swapping all interchangeable pieces to the mag frame from the gp. thanks for any assistance and advice. thanks, mike

Welcome Mike,
I can't help you on your question but you may try putting it in vintage/left kickers . It seems like it gets more hits than the resto page.
good luck to your build.

You must use 74 clutch cover, shifter, and front motor mount plates every thing else is a direct swap.