I have a LD4B and a 600 to go on my Swinger if I get around to it. A little cam bump would be fun as well. I really need new exhaust. Mine is the original 70 single system that the po cut and turned into duals. It is getting pretty rotten. I have some 68 340 manifolds to put on when I do. Drivers seat upholstery comes first. I just ordered that yesterday.