JoeK, I am new to the forum here but have quite a bit of experience with projects and have had a 240 for nearly 30 yrs. I just brought the old girl in for a complete makeover. I would love to see/hear more details on the rotisserie you built and will follow this with interest as I am just heading into all the replacements due to years of rust along with every reinforcement I can make.
I did a frame off on a Jeep JK Unlimited LS3/6L80E project. I used POR15 (on any bare metal) followed by 2 coats of Lizard Skin SC and 2 more of the ceramic on each side of the tub coated with an industrial urethane for protection. It has worked very well. There are some tricks to the procedure which I happy to share if you would like. You can see the Jeep build here: http://www.rme4x4.com/showthread.php?77265-Jeep-JK-Unlimited-quot-Transformer-quot-6-2L-quot-LS3-quot-GM-build
Don't want to derail your thread.
Dave