Converting to Power Steering 68 c10 6cyl

[NC67Chev]

Originally Posted by sambudo

They look the same, but without measuring I can't say for sure. I have the pump from the 70 c10 p/u. The pulley is bent. I think I'll try abd put this in to see if it lines up with the 2nd pulley, coukd you tell me wht pulley pn you have on your pump? If I dont need the 3rd pulley that woud be gr8. But the way it is currently it looks like I need the 3 groove in my crank.

From other threads ut looks like the pumps might be more narrowed. Some seem to be not sticking out as far from the flange part of the pump. Not sure if im making sense.

It does look like there's a larger gap between the pulley and the pump on yours than mine. Measure the gap between the front of the ump and the pulley. Mine measures 1.5". I think the pn on my PS pulley is 37705090EGM, but its really hard to read.

[primetime]

U did this swap in my 77 c10 I had a few years back. Any time I saw an inline 6 in the boneyard I'll pull the brackets off them. I believe I still have a ps pump and gearbox connected to the lines buried under junk in the garage. I'll snap pics in the morning or after work tomorrow. But I did my swap on the '77 c10 with zero issues in one afternoon. Look for the disco-novas in the junk yard 75-79

[sambudo]

Originally Posted by primetime

U did this swap in my 77 c10 I had a few years back. Any time I saw an inline 6 in the boneyard I'll pull the brackets off them. I believe I still have a ps pump and gearbox connected to the lines buried under junk in the garage. I'll snap pics in the morning or after work tomorrow. But I did my swap on the '77 c10 with zero issues in one afternoon. Look for the disco-novas in the junk yard 75-79

I'd love to see the pictures. Thank you.

[sambudo]

Originally Posted by primetime

U did this swap in my 77 c10 I had a few years back. Any time I saw an inline 6 in the boneyard I'll pull the brackets off them. I believe I still have a ps pump and gearbox connected to the lines buried under junk in the garage. I'll snap pics in the morning or after work tomorrow. But I did my swap on the '77 c10 with zero issues in one afternoon. Look for the disco-novas in the junk yard 75-79

I'd love to see the pictures. Thank you.

[sambudo]

Originally Posted by NC67Chev

It does look like there's a larger gap between the pulley and the pump on yours than mine. Measure the gap between the front of the ump and the pulley. Mine measures 1.5". I think the pn on my PS pulley is 37705090EGM, but its really hard to read.

Mine measures 1- 15/16 appx. So yes it's shaft is longer. I'm going to try and add the 3rd groove on to the harmonic balancer. I need to first clean my 2 groove and find the 3 holes to attach the 3rd.[ATTACH][/ATTACH]

[sambudo]

The pump from the 70 c10 2wd, seems to be appx 1.5", but its hard to really get an accurate measurement as the pulley is bent. Not sure if this is a good pump or not, the shaft has a little play in it.

To take the old pulley off, do I need to have a special tool? Do you need special tool to press it back on? I would really like to have the ps pump align with the 2 groove pulleys. I appreciate the help.

[NC67Chev]

I think those pulleys are pressed on. I think you might be able to loan a tool at advance or autozone.

[sambudo]

Originally Posted by sambudo

Mine measures 1- 15/16 appx. So yes it's shaft is longer. I'm going to try and add the 3rd groove on to the harmonic balancer. I need to first clean my 2 groove and find the 3 holes to attach the 3rd.[ATTACH][/ATTACH]

Well seems like I'm stuck, not sure what to do. I have the acquired the 3rd groove pulley to bolt on to my harmonic balance 2 groove pulley. But I don't have the proper bolts to bolt it in place. Do you have any idea what size bolts go in there?

my other option is to get a different pulley for the other 70 2wd c10 pump I have. Promlem is I need to remove okd pulley and replace with new one. Plus I need the nut on the end. I still dont know if it is a good workibg one or not. Seems to be alot of play when I move the shaft.

[NC67Chev]

Pretty sure the bolt is 3/8 - 24 x 5/8. I used grade 8.

It's worth a shot to spend a buck on 3 bolts to see if it will work for you.

[sambudo]

Originally Posted by NC67Chev

Pretty sure the bolt is 3/8 - 24 x 5/8. I used grade 8.

It's worth a shot to spend a buck on 3 bolts to see if it will work for you.

NC67Chev thank you, I will try and pick these up today. I got the 3 bolts from the 3rd groove pulley that came off the 74 Nova. They don't fit, seems the thread pattern is to fine. Again Thanks. Stay tuned!

[NC67Chev]

Originally Posted by sambudo

NC67Chev thank you, I will try and pick these up today. I got the 3 bolts from the 3rd groove pulley that came off the 74 Nova. They don't fit, seems the thread pattern is to fine. Again Thanks. Stay tuned!

Well, you might have to clean those threads pretty good, especially if they have never had a bolt in them. They will have been painted over and there's likely a lot of grunge in the threads. The bolts I took off of the Nova that I got my PS parts from were that same size, but I had to spend a lot of time cleaning the threads in the harmonic balancer. If I were a betting man, which I'm not, I'd say the bolts you have are correct.

[sambudo]

Originally Posted by NC67Chev

Well, you might have to clean those threads pretty good, especially if they have never had a bolt in them. They will have been painted over and there's likely a lot of grunge in the threads. The bolts I took off of the Nova that I got my PS parts from were that same size, but I had to spend a lot of time cleaning the threads in the harmonic balancer. If I were a betting man, which I'm not, I'd say the bolts you have are correct.

How did you clean them out? I spent a good hour on them yesterday. Is there a special wire brush or something to chase the threads?

[NC67Chev]

The threads look pretty clean. You could use a tap on them, but I bet you won't need to

[sambudo]

Originally Posted by NC67Chev

The threads look pretty clean. You could use a tap on them, but I bet you won't need to

Last night when i tried to bolt it in, it felt as though I was having to force it. I thought for sure I can hand thread it on then tighten up with ratchet.

I purchased a type of cylinder wire brush, I will work on cleaning up the threads some more this evening. I read several of your old threads when you wher doing the p/s. good reads.

[sambudo]

Good news threads cleaned up nicely. They turned on easy, but for some reason it seems still doesn't line up. My neighbor stopped by and took both pumps. He's taking them to work and is going to swap pulleys for me. The 70' ps pump looks like it might line up if it had a good pulley on it. Will know tomorrow.

[NC67Chev]

Glad to hear. There are some setups (either later years and/or 292's...I can't remember for sure) that have a wider space between the grooves. This would position the PS pulley between the 2nd and 3rd groove, so that might be what you have. I think you stand a good chance that the one with the bent pulley is what you need.....I just hope the pump isn't damaged. If it is though, you should be able to easily pick one up at a local parts store.

[sambudo]

Originally Posted by NC67Chev

Glad to hear. There are some setups (either later years and/or 292's...I can't remember for sure) that have a wider space between the grooves. This would position the PS pulley between the 2nd and 3rd groove, so that might be what you have. I think you stand a good chance that the one with the bent pulley is what you need.....I just hope the pump isn't damaged. If it is though, you should be able to easily pick one up at a local parts store.

I hope the shaft isn't damaged either. I'll find out tonight! Keeping my fingeres crossed. I think I will also do some salvage yard hunts this weekend.

[primetime]

Here's a pic of one of my extra assemblies. I. Can't recall if this one came off a 250 or 292. But the just take it off a factory nova 75-79. Direct swap. Keep the hoses connected to the pump and steering gear box. No need to break the 2 lines loose. Take off your manual steering gear box and install the new power steering gear box. The only problem is if you have a 292 in your truck, you have to fine the correct brackets. That was my stumbling block intill started taking the entire systems.

[primetime]

Another angle

[sambudo]

Well it looks I'm still on the hunt for a pulley. I think I need on that has an offset. Lik this one in the picture. Can I buy one or do I need to shop at the junk yards?

[sambudo]

Originally Posted by sambudo

Well it looks I'm still on the hunt for a pulley. I think I need on that has an offset. Like this one in the picture. Can I buy one or do I need to shop at the junk yards?

This is what I'm going to need to make my belts line up.

[sambudo]

image2014-03-06-143306.pdf

Originally Posted by sambudo

Attachment 1223650

this is what i'm going to need to make my belts line up.

[sambudo]

Originally Posted by sambudo

Attachment 1223650

This is what I'm going to need to make my belts line up.

Can you tell me what the dimension you guys have for this? I'm trying to find out what the stock OE dimension would be for this center of pump to pulley to face. Thanks

[NC67Chev]

That's what mine measures. Would it make a difference if you turned the PS pulley around?

[sambudo]

Originally Posted by nc67chev

that's what mine measures. Would it make a difference if you turned the ps pulley around?

1-13/16?