Trans tunnel big enough to fit T56 with engine raised 1" from stock location (helped with clearances for headers, oil pan, alternator, and A/C pump for LS1 swap)
Driveshaft tunnel behind it being mocked up:
I don't have a sheetmetal roller, so I had to do it all with shallow bends on a 4' brake.
Not much shaping going on there, but I did use the hammer a lot to make stuff fit.
