Well, here we go with the rear end swap.
I'm considering "simply" adding a sure grip to my 8 1/4 rather than transplanting an 8 3/4 even though I have one. The weight difference is incredible.
So, I'll be tuning in frequently
On somewhat related notes-
Last year I went to a cruise with a new friend (FBBO member) and his out of town friend.
We had 71/72/73 Roadrunner, SSP, and Satellite.
That was pretty neat.
Pretty sure lead was used on non-vinyl top cars but starting in 72-ish plastic filler was used under vinyl. At least on B body cars.