A big hurdle of a LS1/T56 swap was fitting the transmission in the tunnel, while keeping the car low, getting proper driveline angles, and having plenty of driveshaft tunnel clearance.
I decided to just cut the whole tunnel out and make my own. I also fabricated it out of heavy 16ga steel as this tunnel provides a lot of the body's stiffness. Templates were made from construction paper, then traced onto a flat sheet, cut out with plasma cutter, and formed in Dad's home-made 4' sheetmetal brake.
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