4 groove crankshaft pulley

[8door]

Is there such a thing? I am adding a/c to a 350 V8 and it now has a 3 groove crank pulley, but the third position, counting away from the harmonic balancer, has a space between 1st and 2nd grooves,see attached photo.
I'm thinking the components I have are off a smog pump motor that only had power steering.
A 3 groove will fit and line up with the water pump pulley, which will be changed to a 2 groove. And then line up with a/c compressor and alternator, but the 3rd groove won't be in line for the power steering pump.
Could it be a different pulley is needed for the power steering?

[Green Machine]

The cast iron pulley is available with 2 grooves, giving 4 total with the double steel pulley. I have one on the 68 if you need a pic.

[Green Machine]

Dang, can't edit, have that backwards, you can get a steel pulley for the crank with 2 grooves and add the cast iron one for a total of 4, our 68 had a smog pump at one time so the water pump and crank pulley are double. We added the cast iron pulley to get power steering.

[Sinisterspeed]

I have a 3 grove pulley and it runs AC and PS....... I am pretty sure it goes like this.

Back one goes Crank, PS
Middle one Crank, Water Pump
Front one- Crank, Water Pump, AC

I could be off on which is which. But, I know it does do AC and PS with only a 3 grove pulley.

[8door]

Originally Posted by Green Machine

Dang, can't edit, have that backwards, you can get a steel pulley for the crank with 2 grooves and add the cast iron one for a total of 4, our 68 had a smog pump at one time so the water pump and crank pulley are double. We added the cast iron pulley to get power steering.

That makes sense. So I will only need to buy a 2 groove water pump pulley and 2 groove crank pulley. Then there will be one grove left over.
1 Water pump, alt
2 A/C
3 blank
4 Power steering
Got a picture of yours?
By the way I like your red 68, that is what I'm going for, is a stock look.
Here is what I've done so farNeeds little more work

[westofb]

Originally Posted by Sinisterspeed

I have a 3 grove pulley and it runs AC and PS....... I am pretty sure it goes like this.

Back one goes Crank, PS
Middle one Crank, Water Pump
Front one- Crank, Water Pump, AC

I could be off on which is which. But, I know it does do AC and PS with only a 3 grove pulley.

No alternator/ generator?

[8door]

Originally Posted by westofb

No alternator/ generator?

Ya I noticed that also, but the alt/gen does runs off the water pump so it takes 3 grooves, I finally figured it out.

[Sinisterspeed]

yeah. i knew I was missing something. LOL.. but. I also knew that you didn't need 4 grooves to run ac.

I am pretty sure that the middle groove runs the Alt also.

If the paint shop hasn't had my truck for 10 friggin months. I might have been able to just look.. LOL

[BluTrukker]

I'm not 100% sure if it is the same on civilian trucks, but the military hummers with the old 6.2 or 6.5 have a steel 4 groove pulley that should work.

[Green Machine]

Here's a couple of pics for reference, and thanks for the complements on the 68 !

[8door]

Greenmachine, that's perfect just what I needed to know. I have everything ready to go to get mine on the road, well almost just a few more things, paint, upholstery tires things like that.
Thanks

[8door]

This what I'm looking for and have no luck so far. Calif at least where I am has little junk yards with old parts in them mostly all newer vehicles that supply parts to the back yard repair shops I guess.
I just posted another request for info todaydumb me forgot I had posted this before and got a great picture from Greenmachine...........gettin old.