Well said, Matt... SCCA E/Street Prepared rules do not allow cutting of the floor or full-welding to the floor, etc. Only recently a few years ago did they start to allow the front and rear to be welded... prior, they had to be bolted only. Maybe I'll put in the Hotchkiss eventually, or those CPA(?) round/dual ones? Ground clearance is an issue for me, as well. Ultimately, I don't just want to add weight if they won't give a truly good improvement. Chyrsler built their unibody cars very well back then, in my opinion.