Help....P/S Pulley '65 327/300 w A/C

[Frank P.]

Anyone know where I can get my hands on a power steering pulley for my '65 327/300 w/ A/C in my vert? got the correct pump, just no pulley.

thanks in advance! Frank

[Joe L.]

Re: Help....P/S Pulley '65 327/300 w A/C

Frank------

For your application it's not hard, at all, to obtain a power steering pump pulley. You need pulley GM #3770509. Although discontinued by GM, this pulley is reproduced and available from restoration parts sources like Dr. Rebuild and Paragon. Now, if you had a 65-66 L-79 with power steering and C-60, that's another story. That pulley, GM #3868892, is a very rare bird. The only NOS example I've EVER seen, I bought [not for sale]. It was discontinued 30 years ago. It is (supposedly) reproduced, though, by Paul Baker, "The Pulley King".

Only 3 power steering pump pullies were EVER used for 63-74 Corvette small blocks. The stamped steel '509' is, by far, the most common. The cast iron GM #3834720 is next. The stamped steel '892' is few-and-far-between. It was a Corvette-only piece and used only for the 65-66 L-79 with N-40 and C-60.

[Allan J. Wicklund]

Re: Help....P/S Pulley '65 327/300 w A/C

Joe, Your SCARING me! What about my 67 L-79 with A/C and P/S. Thanks, Al W.

[Frank P.]

Re: Help....P/S Pulley '65 327/300 w A/C

thanks Joe..but Paragon does not have...only single groove and no ac for small blocks.....I need 2 groove...closest they have is #1353 on page 42..for a BB..I'll check with DR. Rebuild..thanks

[Frank P.]

Re: Help....P/S Pulley '65 327/300 w A/C

Dr. Rebuild does not have......this may be a fiasco!

[Joe L.]

Re: Help....P/S Pulley '65 327/300 w A/C

Frank------

Why do you think that you need a 2 groove power steering pump pulley? No 63-82 Corvette small block EVER originally used a 2 groove power steering pump pulley. Absolutely NONE. 63-74 Corvette big blocks with power steering used ONLY a 2 groove pulley. No Corvette big block ever used a single groove pump pulley. Absolutely NONE.

[Joe L.]

Re: Help....P/S Pulley '65 327/300 w A/C

Frank------

If Dr. Rebuild had a 2 groove power steering pump pulley for a Corvette small block application I'd suspect that he'd starting smoking funny looking cigarettes. Either that or he'd created a part for "Brand X" to reproduce afer performing "exhaustive research".

[Joe L.]

Re: Help....P/S Pulley '65 327/300 w A/C

Allan------

For 1967, it's the familiar nad ubiquitous GM #3770509 stamped steel pulley for your application. Actually, I think that the 3770509 will work just fine for 65-66 applications originally using the 3868892. GM never catalogued the '509' for the 65-66 L-79 with C-60 and N-40, but I think it can be used with no problems, at all. Of course, it's not "correct", but I do think that it would be 100% functional.

[Frank P.]

Re: Help....P/S Pulley '65 327/300 w A/C

because every single groove pulley listed in Paragon says "without air"
1963-1968 all 327 exc. 350 hp, W/0 a/c.

[Frank P.]

Re: Help....P/S Pulley '65 327/300 w A/C

Hey Joe..maybe belts were configured incorrectly as it had a late model pump on to begin with...how are the belts configured if ps has only one groove...does ac belt go to wp then crank pulley?

[Joe L.]

Re: Help....P/S Pulley '65 327/300 w A/C

Frank-----

Yes, I agree that it says exactly what you describe. However, I don't understand how that means that a 2 groove pulley is required? It could just mean there is another 1 groove pulley required (perhaps, one they don't list in the catalog). In any event, the reproduction of the GM #3770509 is the pulley you need, regardless of the application listing in the catalog.

The GM P&A Manual cataloguing of power steering pump pullies was not one of the "shining moments" in GMSPO parts references. While parts cataloguing is usually phenomenally accurate (considering the complexity of the subject matter), power steering pump pullies are one of the exceptions. There is MUCH "ambiguity" and, even, incorrect information in this parts group. Some of this has been "imported" into the Paragon and other catalogs.

[Frank P.]

Re: Help....P/S Pulley '65 327/300 w A/C

maybe Paragon catalog is incorrect when it says "w/o a/c" on pulley #3770509?
Looks like a/c belt goes to wp and crank, alt goes to wp and crank and then ps must go directly to crank?? is this right? thanks again

[Frank P.]

Re: Help....P/S Pulley '65 327/300 w A/C

thanks Joe..I'll go with the single groove repro #377...someone must have just reconfigured the belts when they put the late model ps pump on...have the correct one from Paragon now..so I'll just order the pulley and nut and key.
thanks again!! I'll be Top-Flight ready in about 6 months...

[Joe L.]

Re: Help....P/S Pulley '65 327/300 w A/C

Frank-----

AC compressor belt surrounds the compressor, water pump, and crank pullies. The alternator belt surrounds the alternator, waterpump and crank pullies. The power steering belt goes between the an "add-on" crank pulley (i.e. which forms a THIRD groove) and the power steering pump pulley.

[Joe L.]

Re: Help....P/S Pulley '65 327/300 w A/C

Frank------

The later model pump (i.e. the 75+ style) will work perfectly with SOME 1963-74 small blocks. These include all 63-74 applications which originally used the GM #3770509 power steering pump pulley. With the 75+ pulley pressed onto the 75+ pump shaft at the correct spacing, the later unit will work exactly like the earlier. The belt routing should be exactly the same------the "add-on" crank pulley and the power steering pump pulley are connected by a belt which adjusts at the power steering pump.