[Tommy]

Mike -
If your objective is to be competitive in SCCA autocrossing, you should determine what class your completed car would be in and see what the competition is running. When I tried autocross, my car was classified in A Prepared and ran against some very strong competition from Mazda. My opinion is that Cobras are not generally the best for competitive autocrossing, but they are fun and can be made street legal. I have no experience with Street Beasts and can't comment on that particular kit.