4onthe Floor; I was lucky on the two groove harmonic balancer. Went to the wrecking yard about six months ago and walked right up to a 57 Chevy car with the front sheet metal pulled off of it and there it was. Pulled it off in about one minute. Some things are meant to be.
It has a small wear groove where it goes into the timing cover seal. Should be OK. I think somebody makes a kit to repair the groove caused by the seal.
Yachtcare; I would say you are lucky to have one. They are not too easy to find. I've been looking for a second (better) one and have not found one.
I have no idea as to where to send you on a power steering setup picture. Maybe some of the 55-56-57 guys know. Also, check some of the repo guys that do repops for 57-62 trucks. Two other places to ask questions are Jim Carter and Obsolete Chevrolet in Nashville, GA.
Good luck!
