I learnt something today. I thought I had a fancy protractor for measuring brass fitting seat faces (SAE 45o versus 37o AN versus the funky 60o Lucas) on old carbs and fuel kit. Never knew it was a contact goniometer 

Cheers,
Harv

Wonderful! Now I know too A century you live, a century you learn!

After 18 months of on again off again work on the car, I’ve finally got the outer sills replaced. The problems with the right sill were nothing compared with the left side. After trying a few times to match up the sill with the body I found it to be 1/4” long???. In the end I trimmed the “B” pillar section and sat the sill back on the car, this showed the rear of the sill matched up with the rear wheel well and the front was 1/4” forward of the lower”A” pillar. So began the task of cutting down and reshaping. Only then to find the shape from the top to bottom of the inner sill was also out.
After more than a few adjectives and a ratchet strap and vies grips, the sill finally capitulated to a point where it could be welded into place. With a bit more manipulation I got it to a point were I could fit the doors and guard with a reasonable gap. Now to do the fine tuning the fitment and gaps, and then do the same on the other side, thankfully the sill has been done so hopefully it won’t be as bad. Having problems getting into imgur so photo to follow.

Wow, you really decided to do it! I read the amount of work, and I can't imagine how much time it would have taken me...

Having sold my parts catalogue, [the 1st 20 yrs], I'm now looking to ID AC Delco rotor button, no. 7424753. I kept the catalogue which includes parts pertaining to the FC Model, [prefix 741etc]. I'm guessing that this is for the red motor, however, may suit later motors?  Appreciate help on this one please.  Kevin.

It always happens - you throw away or sell the thing you need, and then you need it Try to find a replacement, don't hang on to your old catalog.