A buddy of mine got a 90t from a swap meet. We fired it up and it was weak. DFound one of thge pushrods off the rocker. Fixed it and he put it in an ultrasport. He wanted speed also and was dissapointed. He promply traded it for a 90 enya and was happy. The guy he traded it to a guy who put it in a bi plane and was happy with it. scale speeds for sure but torquey. Oh, it was the older ABC "hemi head" twin carb.