I wanted to know what the performance difference would be if I installed split exhaust manifolds on my 1954 chevrolet 1-1/2 ton with a stock 1962 1/2 ton 235 sm 420 transmission w/a 2-speed rear. I like the sound of the split six and plan to route the exhaust through 4-inch stacks. the truck will be loaded with construction tools and may pull a trailer with a skid steer loader,etc. I heard that the split manifold may affect my bottom end torque but will increase my top end power. I plan to upgrade to a 261 later on.