We have put a couple in '32's - it isn't a big deal at all.

You didn't say what kind of car you were building, but one thing to consider really even with any '32 is to push the front crossmember forward 1" in the rails - you don't really need to stretch the rails themselves. If the car is full-fendered you can extend the feet on the radiator, and move it forward on the crossmember, leaving the wheelbase stock. It seems like you can never have enough room in that engine compartment.