Hello,

I just purchased a 1974 Corvette automatic with 350 a couple weeks ago and it came with manual steering. After reading on this forum about the Borgeson P/S kit upgrade I decided to give it a try.

Now let me say first that I'm in no way a mechanic so swapping out the steering was a big job for me. It took me about 10 hrs spread out over several days mainly due to the trouble I had removing the pitman arm from the manual gear box.

Once I finally got everything complete I hit a problem that I need help with. The Borgeson 2 groove P/S pump pulley doesn't line up with the add on pulley that I installed nor does it line up with the factory crank pulley. It's half a groove off.

After taking measurements it looks like I need a 6" diameter pulley with a 5/8" bore and a 3/8" negative offset for it to line up.

Can someone help me out or point me in the right direction on where to purchase the correct pulley?

Any advice would be greatly appreciated.

Below are two pics. One of the P/S pulley not lining up and the other without the pulley if that helps any.

 

I would check with Borgeson, that mounting bracket looks like is putting the pump in the wrong location.

 

It looks like they only offer one type of pump mounting bracket for the small block. I haven't seen one on their sight that mounts the pump offset behind the front of the motor.

 

How about a GM for a 1974 Corvette?

 

Here is my 78 PS with press on single belt pulley. Not the best picture but it shows the bracket and engine.

 

I PUT A BORG. ON MY 69 BB THE PULLEY YOU HAVE IS FOR A BB NOT A SB, SB HAS A 1 GROOVE PULLEY. IF YOU HAVE A CORVETTE CENT. BOOK, LOOK AT 327/350 PUMP BRACKET SET

 

thegazman,

I thought of that too and all the GM P/S pumps and pump mounts are all basically the same, even the same part number. They mount the pump flat against the front of the motor.


Mikep3,

Thanks for the pics. My pump mounts in the same location as yours against the front of the motor except yours has a gusseted brace in the back.

rays699,

I checked the part number on my pulley and the one on the Borgeson site for their Corvette small block kit and it's the same part number. By the way, what is a Corvette Cent. Book? I'm afraid I'm very new to the Corvette so I'm clueless..lol

I'm wondering if maybe the engine in my car isn't the factory 350 engine and instead it's a 350 with a standard short water pump instead of the Corvette water pump which would put the water pump, alternator and crank pulleys closer to the motor which is why the P/S pulley I have sticks out about 3/8" further than it should. If that's the case, I'm thinking a standard GM 350 pulley would work but that's just a guess.

I'll measure the water pump on my car and see if it's a Corvette or a standard short water pump and see if that might be the case.

Anyone else have any possible ideas?

 

The first Borgeson kit I ordered had the correct Corvette part number on the box, but when I opened it the gear was for a 50's Chevrolet. Mistakes happen. If the guys that have done he swap say you need a single groove pulley, then you must need a single groove pulley

 

I was just saying I checked the part numbers and they were correct. I agree with you, mistakes happen all the time which is why I never trust a sticker and I checked the part number that's cast into the pulley.

I also agree that I need a different pulley since the one that came with it doesn't match up. I checked the P/S pumps and brackets compared to the other Borgeson GM parts and they all have the same part numbers which means they interchange so I know the pump and bracket are correct. I also checked the part number and referenced the pics on the Borgeson site and it would appear that the pulley I received is also correct. I also found other threads on the Borgeson P/S upgrade kit installs on this site and found pictures of the kit installed on a C3 Corvette 350 engine that also used the same 2 groove pulley that I received. The pictures were very good and I actually printed them out and used them during the install of my kit since the supplied instructions were lacking for someone with limited mechanical experience.

I'm going to call Borgeson Monday and talk to them about the problem I'm having. I just posted on here thinking maybe someone else had the same problem and would know the correct pulley I would need. I appreciate all the help but what I'm looking for is for someone to tell me the correct pulley, not just that I have the wrong one because I already know that.

 

If you look at the Borgeson kit part numbers you will find that the big and small block engines have different pump brackets and pulleys. The big block pulley is two groove #562312 and the big block bracket is #562325. If these are the part numbers you have you have a kit for a big block and it will not fit a small small engine. By the way, the small block pulley is single groove.

 

CORVETTE CENTRAL IS A VENDOR FOR CORVETTE PARTS, GO TO THERE WEB + LOOK UP YOUR PUMP BRACKET SET # 562320 + SEE IF IT IS SAME AS YOU HAVE!!!

 

I checked out your part numbers on the Borgeson site and they don't match up to the parts they have listed so I did a google search and they came up on the Corvette Central site for the part numbers on the factory Corvette parts. Since my car had manual steering I don't have any factory part numbers to reference.

I checked my part numbers that I ordered from Borgeson with their site and they all match up to the correct parts that they have listed for their Corvette P/S Kit.

Here is the number for the kit I ordered along with the numbers for all the individual parts that make up the kit.

1) Corvette P/S Kit, 1967-1982 SBC/SWP with factory Manual Steering #999017

2) P/S Pump, Painted Black, GM Pressure #800310

3) Pump Bracket, Steel, SBC/SWP #802400

4) P/S Pulley, 2 Row, Cast Iron #801005

5) 2 Pc Stainless, GM Pump to GM Box hoses #925203

6) P/S Conversion, Delphi gear box, 63-82 Corvette #800108

7) Rag Joint, 18MM DD X 1"-48 #055043

Since all the part numbers are correct for the kit that's suppose to fit my car and engine, it leads me to believe that maybe my 350 engine isn't stock and that's why the pulley sticks out too far. I'm thinking that maybe I have the standard GM short water pump instead of the slightly longer Corvette water pump which means the pulley I received from Borgeson would stick out slightly further, about 3/8". I believe I need a single groove pulley for a standard 350 engine with a short water pump.

I just don't know which one to order because there are so many different kinds of pulleys for the 350 and I honestly don't know enough about car parts to know for sure which one would be correct. Not all of the sites list the dimensions of their pulleys, if they did I wouldn't have a problem. Since the kit came with a 6" diameter pulley I assume I would have to stay with that size so I need a single groove 6" diameter pulley with a 5/8" keyed bore and a 3/8" negative offset. I just can't seem to find one.

 

I Think the add a pulley should go on the end of the crank, not the PS unit.

Zorro

 

The add on pulley is installed in front of the crank pulley, not the P/S pump.

 

The pump bracket on Corvette Central is slightly different than the pump bracket that came with the Borgeson kit. The difference is that the Borgeson bracket doesn't have the extra gusset support that mounts on the back. I assume it's the same, just their version of the 350 pump bracket. The Borgeson bracket is linked below so you can check it out.

http://www.borgeson.com/xcart/produc...&cat=63&page=1


After looking at the bracket you linked to, I believe I need this P/S pulley linked below.

http://www.parts123.com/parts123/yb....5Z50000050G~~~

 

Then why does the PS pump on your car have two groves? Look at the photos above they show the same setup as my car (79) with one grove.

Zorro

 

I have the wrong pulley on my car, it came with the P/S conversion kit from Borgeson. That's why I came on here to get help finding the correct pulley.

If you look at my crank pulley you can see the jet black add on pulley in front of the factory crank pulley.

I'm new to doing my own mechanic work on cars, that's why my car knowledge is limited. While all my friends were working on cars and building engines, I was assembling AR15's and building Ak47's from parts kits.

 

I can see that. Just trying to help (not very well I guess) sorry. Any extra AR lowers?

Zorro

 

Don't be sorry at all bro, the pics you posted were a big help and I really appreciate it. Since I don't know much about cars it's easier for me to better understand something when I see a picture.

Sorry, no extra AR lowers. I used my last one building a long range target rifle in 6.5 Grendel. I could shoot a 5" group at 1000 yds with it but ironically I traded it along with a Sig P226 S4 pistol toward the 74 Corvette that I'm working on now.

 

I GOT MY KIT FROM CORVETTE CENTRAL, FOR A BB , ALL PARTS FIT EXCL. BORGESON HAS UNIVERSAL BRACKETS, NOT CORVETTE CENTRAL ONLY SELLS REPRODUCTION ORIGINAL FOR ALL CORVETTES FROM C1-C6, IF YOU ARE NEW TO CORVETTES GO ONLINE AND GET A FREE CATALOG, ANDYOU CAN SEE ALL THE PARTS SAME AS FROM THE FACT. RAY