dssur
+1y
Thats a super sweet how to seth, but he wants to know about stock floor bd.
I did my mazda sfbd, I laid the frame out on a jig I built and spaced the rails up about a 1/2 inch to make sure the new rails were even with the front crossmember which hangs down about 1/2 inch lower (no ghetto lean this way) I also put pegs up through the centers of the body mounts and cut them off flush. This wa I could get the body mounts exactly in the right place without a bunch of critical measuring.
Here is the real trick though: The factory rails are 5 inches tall and my new rails were 3iinches tall. That would normally work out to a 2 inch body drop (lay pinch, not rocker) but since I had spaced the rail UP a 1/2 inch from the start, I was able to drop the body mount 2.5 inches (measured from those pegs that were cut off flush, now they stuck up through the new mounts 2.5 inches) You have to remember to drop the core support mounts 2.5 inches also. I reused the factory transmission crossmember and built new center and carrier bearing crossmembers, notching them for the exhaust.
Pics in my profile. I rebuilt the rear clip too, but if you were inclined you could just rebuild the center section, wiggity wayner did that and it worked out nice. I will never ever do another traditional bodydrop. You really feel like you are sitting on the ground with a sfbd.