Frame Connectors

I got the mancini weld -in connectors and they fit great on my 1971 Demon. Only drawback was cleaning the underneath of the car enough for welding. I cut some holes in the drivers side and inserted an angled tube so the e-brake cable could go through instead of hanging under. Actually, I didn't do anything. I had my students who are building my toy do the job. As far as wheelbase, it's simple to measure from center front spindle hub to center of rear axle.
kenny b