I'm pretty shure I had one of these, trying to line up an ac pump on an early 350. I have a 4 gruove crank pulley. I don't like the 307 pullies. expecially the alt belt. If I could get some measurements of wp pulley that would be great

 

Hi Lars
I don't know much about the late 1970's and 80's vintage. But on the only 4 belt pulleys I've seen were the late 1960's with AC and AIR pumps. It sounds like your having trouble lining up the belts? I think you best bet would be to get a full set of matched pulleys, making sure they fit the water pump length you have. Or let us know which water pump you have, the codes on the pulleys you have, and see if someone can provide the one you need. I've wasted a lot of time trying to get belts to line up when I had mixed and tried to match pulleys.

John

 

well I have 2 complete sets of pullies from a 307, and I have a set from a 76 350. and a few odd pullies. ill get the codes soon.

 

I'm just gonna run the 307 pullies f it