[PNJSNAK]

H-rod
The rad mount is correct, not sure why it was designed that way, but I just mounted it.
I also did not use the self tapping screws. I drilled thru and mounted with bolts and nuts.
I had seat tracks bolted thru the fiberglass with large washers.
I went with new seats after a while because of no support or cushion in A$C seats and I mounted them right to the floor so no adjustment.
The glass floor is about 1/4 to 3/8" thick.
Maybe others will chime in from A$C forum
Jim