[mrennie]

Hi, I posted this is the Heating and Cooling section but got no replies, so this might be a better place to ask.

I am confused about what pulleys are required when installing an aftermarket A/C system on a car that was originally non-A/C.

I am looking at installing a Vintage Air system in my 70 Judge and am not sure which pulleys, if any, need to be changed. I also will have power steering if that matters.

Do these aftermarket systems work with the stock non-A/C pulleys, or do I need to install the factory A/C pulleys?

If so, which pulleys are different and need to be replaced? Just the crank and water pump, or are the power steering and alternator pulleys different too?

Thanks for any help you can provide.

[2002Z4CSS]

The factory a/c on my GT-37 just uses another separate crank pulley.

Here is a video of my engine running when it had a rod knock but you can see it only uses the crank pulley. Click opn the picture to see the video.

[mrennie]

After reviewing the assembly manual, restoration guide, and an old microfiche I forgot I had I have found the part #'s I will need. It appear that 1970 A/C with PS engines used a specific #9799128 water pump pulley (different from 68 or 69) and used the same #9786900 PS pulley that was used in 68 (69 seems to use the larger #9786901). I found an old microfiche and compared it to the Restoration manual to come up with the above, so it should be correct.

Thanks