edited// I am surprised that no one has taken a j-body convertible, such as a chevy caviler, and putting the cimarron parts (front clip, interior) to have a poor man's convertible Cadillac. I have seen a pontiac fiero with a N* planted firmly inside. I would assume if N* fits in a fiero then it would fit in a j body. Hmmm, convertible cadillac with a v8 and a 5 speed. even without the N* there a few other good engine choices.