I'm having enough fun that I eagerly dove (properly covered, goggled, and respirated, of course) into a cloud of fiberglass dust today, to get the rear clip to fit. Minor reward = no itching. Major payoff = I can't stop

!
With the rear clip removed - amazing to me how it looks like it should all be together, despite the fact that this was originally an antique hot rod.
All together now...
I thought I had a lot more work ahead of me to get clearance for the engine, but this is perfect.