Pulleys

[WETOWM]

I have a 70 4x4 350 with p/s it has a 2 groove water pump pulley and a 3 groove crank pulley the crank pulley has 1 stamped steel groove and a 2 groove cast iron pulley. I want to add a/c do i need differant pulleys ? Thanks for any help rich ...

[Keller]

nope, my a/c truck has the exact pulley setup that you are describing. power steering belt connects straight to crank pulley. a/c and alternator belts connect to crank and water pump. make sense?

[70truckguy]

Can you post a pic? I have the same setup, but something just isn't right.

[Livrat]

Originally Posted by WETOWM

I have a 70 4x4 350 with p/s it has a 2 groove water pump pulley and a 3 groove crank pulley the crank pulley has 1 stamped steel groove and a 2 groove cast iron pulley. I want to add a/c do i need differant pulleys ? Thanks for any help rich ...

Yes you will need a stamped steel 2 groove crank pulley. It will look like this one
http://cgi.ebay.com/ebaymotors/Pulle...ssoriesQ5fGear

[AustinScott]

Here is my truck, it was factory AC and power steering when I bought it






In the picture below you can see It has 3 groove Waterpump & Crank pulley. they are all the stock pulleys I just added new brackets & removed the AC setup.

[WETOWM]

So does the ac belt just run off the crank pulley and not the water pump pulley

[Livrat]

The AC runs off both the crank and water pump. the alternator also runs off the crank and water pump, it uses the grooves closest to the block and the AC uses the next ones out towards the radiator

Note: your setup uses a cast iron 2 groove crank pulley and a flat PS pump pulley instead of the one pictured, but the WP pulley and stamped steel 2 groove crank pulley are the same.