Ok it was not a real backfire, it appears that my engine ground strap got cut somewhere in the process, and it was actually arcing to the frame. New straps have been installed, but I think that it fried my gauge senders, as both oil, and temp jump up to almost max when the key gets turned on. So I need to get that worked out before I try starting her up again, need to make sure she does not get to hot, and there is good oil pressure