What are the dimensions of the rear frame rails im 10 hrs from my car im at college and i can fabricate the rails in my class, i have a 1968 Mustang Coupe it had the h.o 289 but i got a 302 for it now.

 

Don't bother making them because they are cheap to buy. Besides, they have a bend in them and it would be difficult to get the shackle hole just right.

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