The 6l90 is huge and has awful ground clearance. I want to be able to comfortably drive this car. I raised the trans 3" to allow plenty of clearance. I might need to raise the entire driveshaft tunnel but i wont know until I get the rear 4link setup.
Unfortunately, I found my fully welded trans tunnel interfered with the vintage air unit. I moved everything to the passenger side as far as possible and hammered the cowl area allow more room.
Since I am using vintage air, I shaved the firewall. the firewall on the 2nd gens arent flat. The gas pedal area is recessed more and sticks out farther into the engine bay. I think it turned out alright.
You can also see I relocated the wiper motor to under the drivers fender. I used a motor from a 4th gen i picked up for free.