I bought a serpentine setup from the pull apart. Came off of a 91 Caprice. A couple of questions. Will the power steering pump off of my 79 work with the 91 serp pulley? Also on the bracket for the a/c compressor there is two places for bolts that should go in the head. Problem is my head only has one hole. If I install all of the braces that came with the setup will missing that one bolt cause me grief down the line and has anyone else ran into this situation and how did you handle it?

 

The Serpentine Power Steering pump (1991) has a metric threaded high pressure outlet. Hopefully you can use your 1979 Power Steering pump. However, the Serpentine pulleys will, I believe, only be compatible with a power steering pump that has the pressed on pulley. If your 1979, like the early C3's, has a pulley attachment nut (not pressed on) you might have to use a 1991 style pump.

I'm using a GM Performance Part Serpentine kit on my ZZ4. To use my english threaded P/S hoses, I'm going to try to put a 1969 power steering reservoir (the spam can) on the kit's 1991 style power steering pump. Basically this is an attempt to adapt from a metric threaded P/S high pressure outlet to an English threaded high pressure output. I'm trying to avoid having a custom made high pressure hose made.

If you use the Serpentine kit you'll need a long style reverse rotation water pump. I bought one from Edelbrock (aluminum).

...about the fact your head is not drilled for two bolts. This is apparently OK. The GM Serpentine kit states that you won't be able to use both attaching bolt holes on some heads. The kit says don't worry about it. I could only use on attachment bolt and everything seems OK.

The GM kit has an idler pulley to substitute for the lack of an SMOG air pump in the kit. The pulley will interfere with your passenger side spring tower. Solution: Install the pulley upside down, it'll clear. Another solution some people have used is to not install this idler pully.

The crank pulley...The Serpentine kit comes with a giant diameter crank pulley and a very small diameter alternator pulley. I bought underdrive pulleys from March. I bought a underdrive crank pulley, a PS pulley, and larger diameter alternator pulley, a water pump pulley all for about $230. The March polished pulleys are beautiful and get rid of about a 12 hp loss due to water pump/alternator drag.

 

60/70 vette- thanks for the good info. I have a press on pulley on the powersteering so I did a little measuring and some tall a$$ guessing without pulling mine off yet. The diameter of the shafts on the pump looks to be the same. That is good to hear about the one bolt in the head also. That's a relief. Thanks again for your response.

 

I have the same setup ,on p/s pump if you look at the threaded area where the pressure hose screws into ,you can change them out and use either pump ,it has a big hex on it,another thing is the low pressure side tube if you use your old ps pump it will interfere with the block,so try and use the pump off the caprice and just change out the metric peice with your old one,.