With the rear of the car in final primer I spun the car around (Go-Jacks are awesome!) and turned my attention to lining up the doors and front end sheet metal. I'd loosely assembled everything to determine if I'd be able to use the 81 subframe, 70 steering, and 70 core support with the solid body mounts. There are differences in the subframe front horns that affect the position of the bumper brackets and steering but with various modifications it looks like I should be able to get everything to fit.
The door hinges were installed bare metal to bare metal at the factory on the 2nd gen F body cars I've worked on. If the area where the hinge mounts is covered in primers/paint it's a lot more difficult to line up the doors because the paint sticks together when the bolts are snugged or tightened. Then if you try to move a hinge just a little while aligning things it usually jumps farther than you want it to move once you get it to pop free.
So I sand down the area on the cowl and door as well as the hinge surfaces to make adjustments easier. Then because I'll be leaving the hinges on the cowl when the doors come off for the cut ins I sanded down the final primer that was already there to 320 for paint because it's easier to sand without the hinges in the way (they'll also get the Scotchbrite scuff before paint).
Once sanded, a little spray lithium grease gets shot inside where the plate slides around in the cowl and door and a thin film of grease where the hinge touches the cowl and door. This allows easier adjustment of the doors and a bit of corrosion protection. Careful attention to keep grease off areas that will be painted is a must and after the hinges are mounted wax and grease remover used all around hinges to remove any possible residue.
