im currently running the original 200r until I can afford a 700r or I get a 700r for my Chevelle and swap the th350 into my monte I have access to every tool needed ive already done an off frame restoration on my Chevelle and everything is in great shape but I am debating boxing in my frame because of the higher tourqe the motor is putting out im scared im going to twist it also motor is not currently in the carwhat kind of tools do you have access to and what transmission are you going to be using. I don't know what you have done with you car up to now but you want to make sure the frame, body mounts, suspension bushings, ball joints, control arm and their connection points on the frame are in good shape.