[Humble]

I used the corbeau seat frames in my old 72 super race chassis and while they were still a little too tall for my tastes they weren't nearly as bad as the 3 point style. I think the best way is to fabricate your own mounts that way you can get the perfect seating position. You might be able to use a universal seat mount and reinforce the pan or weld tabs to the heater channel and center tunnel.

Actually I still have a set for a 71-72 super that you might be able to modify to suit your needs if you want them.