For anyone wanting to convert the A body from 5x4 over to 5x4.5

Congrats on your conversion, but in my opinion there are better options. While i admire hot rodding, spacers, sleeves, no thanks.
73-76 spindles do not just bolt on. They require the upper control arms changed as well from a 73-76.
All good there. Most would either change the axles in their 8.75 to big bolt or swap out to a 73 up 7.25 or 8.25. Easier than any of this is to buy a set of 15" small bolt wheels from Wheel Vintiques ect.
Anyways, if its good for you, thats all that matters.