PS pump questions

brdtee Posted 2020-04-28 6:11 AM (#597453) Subject: PS pump questions Veteran Posts: 262 Location: Pieksamaki, Finland, Europe My '57 is missing the original PS pump which should be the Thompson type with two groove pulley, slightly bigger in size than later model TRW-type pumps of the sixties. I'm going to use a '62 TRW-model PS pump instead but it has a pulley with only one groove while there should be two grooves ... so far I haven't found any '62-66 TRW PS pumps with two groove pulley so I'm wondering if the pulley is interchangeable from GM's TRW-type PS pumps where two groove pulleys are available. Or does someone know where I could buy a correct pulley for the pump? Or if someone has an extra '57 PS pump for sale, I'd be interested... hemidenis Posted 2020-04-28 1:03 PM (#597465 - in reply to #597453) Subject: Re: PS pump questions Expert Posts: 3887 Location: Northen Virginia Hothemiheads I think have a GM PS pump and bracket for the 392. Or is what I remember seen there. Of couse, it is far the looks of the over engineer piece of sh...Thompson. Ask Phil what happened when the Thomson decided to do a seizure in the middle of a French highway.