QUOTE(plays with cars @ Jan 23 2011, 11:32 PM)
Michael, nice job. They look great. Any pictures of the build process? What u-bolts did you start with? I was planning on doing a similar build but haven't researched starting points yet.
Thanks. I am very pleased with how they turned out.
HD Galvanized U-Bolts
Thread = 3/8 - 16
Dimensions 3 1/16" w X 2 1/2" L
This size worked perfectly. For the flanges I started with flange nuts. Drilled out the thread and ground down the top of the nut and welded in place. They would be much prettier if TIG welded.
The spacing on the fire wall is important. I spaced them the same width as the harness holes in the back of the race seat, which if I remember right is 20 to 25 cm. Just measure the race seats, this width is pretty standard.
I noticed on early GT cars there spacing looks wider than what is ideal for modern race seats.
I will add a picture of the backing plates if you want.
Regards