Orr89rocz's 1989 Camaro Iroc-z 5.7L

Crossmember = bolt in
Torque Arm = bolt in
pedals = bolt in (I believe the knockout is in your firewall already - 4th gen pedals will work, new master/slave cyl setup new from GM is about $85 & is assembled, bled & ready to install)
LT1 T56 clutch/flywheel/bellhousing/T-O bearing/trans = bolt in
You may need to modify the console for the shifter, and your exhaust as you say to clear the x-member.

There is very little fabrication for this swap. You could do it for alot less than the $3k+ you will spend on the richmond. The T56 is a far better street transmission than the Richmond 5spd, plus no overdrive with the Richmond (5th is 1:1, 1st is very deep - 2.90:1 or deeper). You need to get a Richmond 6 speed to get O/D. Depending on your rear gears that may be a +/-.