Hi thelastgizmo. My 1971 4/4 2 seater has the bench seat and the seat bases are very basic. Consisting of a piece of 5 ply ( bottom sized ) and two pieces of 1" timber screwed and glued to the ply. one at the back and the taller one fits in rearwards of the transverse chassis crossmember. The squab ( cushion ) is held on the ply by some domes. The squab is shaped a bit to accept a bottom. I believe by the sound of things yours does have a metal frame and is not fitted with a bench seat. So the above information is probably of no help. I did rebuild the drivers side to increase the tilt ( I am 6ft 1 1/2" and shrinking!! ) and it did lift my knees up to give a more comfortable position.
Doug
from deep deep downunder
