Paul's first posting says 1952 GMC.
Since the bushing is not threaded on the outside, I would think the threads he is talking about are on the inside.

Paul I forgot to mention. Don't hammer on those spring hangers, they can crack (cast iron).


"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."