I used "1/8" {A} x 1-1/2" {B} x 1-1/2" {C} Angle, A-36 Hot Rolled Steel" from Speedy metals.

For the front inner mounting points I welded nuts to the bottom side of the frame so that they could be installed easily, but those do not extend through the floor like the others. I'm sure there is some impact on the ultimate strength of the seat mounting by not going through the cab floor but I suspect that if the seat mounting is compromised that much I will not live to tell the tale.

My frame was welded to the original back portion of the seat bracket in addition to the cab floor on both sides. The angle was used to make box sections for the 4 fore-aft sections of the frame.

The resulting increase in seat height was judged to be close to the seat cushion height of the original bench seat and seems to be about right for me (5'9").

1949/50 3600 Project
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