Did they ever come with the round-six tcase mount and 32 spline? Im sure if a rock crusher can handle a big block, then a little turbo 5.3 is fine. But i had my mind set on a five speed. In my ignorance, I thought the 32 spline was better than the 29er (chevy vs dodge). But nope, 29 spline is a bigger output. All good since i went with an eco box and the np241c is pretty common around my neck of the woods.An M22 would be nice (as for faster shifting) but unsure if it would live long with the LM7 horsies and in short supply last one I had was behind a Big block Chevy in a 1967 Camaro.
And beyond that the 4500 is meant for a truck not a sports car.