305/350 accessories question
 

My 305A has an alternator in the stock generator position and an (old) aftermarket A/C compressor in the same position, but drivers side. It doesn't have a belt currently.

I have a 2 belt crank pulley, so obviously the front belt would drive the A/C compressor. If I wanted to add factory power steering, I assume it would go low on the drivers side like the 71+ power steering? Would it use a third belt?

How many accessories were GMC putting on these engines, and how would they be driven?

Thanks for your feedback -- I'm new to the GMC V6.

Brian

Re: 305/350 accessories question
 

power steering goes below a/c compressor, uses 3 belt pulley on crank.

Re: 305/350 accessories question
 

Bob,

Thanks, that's what I suspected. Are pulleys interchangeable between the 305 and 351?

Brian

Re: 305/350 accessories question
 

They will interchange and there was an add-on third pulley for the crank that I believe was for the AC on later Trucks.

Re: 305/350 accessories question
 

An add-on pulley? I've got a double pulley right now. This would let me convert the double to a triple?

Happen to have any pics of this?

Thanks!

Brian

Re: 305/350 accessories question
 

Here is that add-on lower pulley photo

Re: 305/350 accessories question
 

Awesome, thanks! You don't want to sell that one do you? :)

Re: 305/350 accessories question
 

Sorry BP, it's part of a package I'm holding onto for now.

Re: 305/350 accessories question
 

You're right on that, later 67-69 with GM Frigidaire compressor like my 68 use that add on third pulley:thumbsup:

Re: 305/350 accessories question
 

BB,

Do you have a picture showing the routing of the belts? I don't have a belt on the A/C compressor at this point, but it looks like the belt would run VERY close to the water pump.

B