David,
Most of the work is pretty easy. If all you need is the tray (and maybe tray support) replaced... you can do most of the work in two weekends.
Friday Afternoon: Pick up rental MIG welder & gas. Practice welding on some scrap metal.
Saturday AM: Drop drivetrain. Drink some beer.
Saturday PM: Clean engine bay & motor. Shower. Ignore the f*ck out of the Supersize Me thread, and order Chinese food! :finger2:
Sunday AM: Drill out spotwelds for tray and support. Clean welding areas. Prime with rattle-can zinc weld-thru primer.
Sunday PM: Use your rental MIG welder and weld in the tray & support. Clean welded area.
Monday Morning: Return MIG Welder
Saturday AM: Prime and paint area. Use POR-15 if you desire.
Saturday PM: Watch Speed Channel and surf the 914Club BBS.
Sunday AM: Go to Church
Sunday PM: Install engine. Hook up battery & drive around the block.
-Rusty