No need to box the frame unless you plan on drag racing the truck. I have a mild 350 in my '56 3100 and have never worried about twisting the frame, but I never launch it from a dead stop either.
Mike B
Mike Boteler
1956 Chevy 3100 Resto Rod 1952 Willys M38 Army Jeep 1983 Jeep CJ7 Laredo 1984 Jeep CJ7 +++++ Silver Spring, MD
