1975 SquareBody with front drum brakes?

[SCOTI]

Originally Posted by NeoJuice

SCOTI, cwcarpenter98,

From what I understand, you're suggesting that I keep the existing upper and lower control arms, but replace the ball joints and control arm bushings. After that, I can install the drop spindles and lowering springs. Then I’ll just need to gather all the components for the disc brake conversion—rotors, bearings, seals, backing plate, calipers, and brake lines.

I'll have the truck home on the 24th and will be able to get some pictures after that to verify what's actually going on out front. I did look under the truck and it did have a front sway bar.

Keep the existing arms. Add the disc brake spec BJ's (diff BJ's between disc & drum apps) & disc brake parts (caliper, standard duty 1.25" rotor, bearing, backing plate, brake line) for a 73-80 C10 drop spindle. *AVOID the LT. DUTY/1.00" spindle/rotor combo.*

Since the front is NOT what it's supposed to be, be prepared to possibly do some adapting as it's a possibility for the tie-rod ends.

Just renove the current brakes from the a-arms & see how the arms pivot. Wiggle them (both top & bottom units) for side to side/back & forth play. If they feel fine, clean them & use them. If you feel slop, rebuild them as needed.

[NeoJuice]

Originally Posted by kwmech

show us pics of the drivers side frame rail around the steering box

Well I bought the truck. I think I bought a Frankenstein that I'm not sure what combinations of year the truck really is.

Here is the steering box pictures. Hope this is good enough.

Also here is the gas filler necks. I feel like its missing something because shouldn't a 75 have the twist off gas caps that at integrated into the box sides and not the flip out door? Also there is no gas tank switch on the dash even though it has dual tanks. There are two toggle switches under the dash on the left hand side. I can get pictures of that later.

[NeoJuice]

Here is the dash.

[NeoJuice]

Body and Interior.

Oh did I mention it also has no brakes? They don't engage until almost hitting the floor and there is no power assist from what I can tell from the booster. Jesus what did I buy.

[MJN]

Its definitely and franken truck- '81 and newer box, '77 and newer doors, lack of dual tank switch makes me think the cab was changed or the extra tank was added. Gas pedal is '71-'73, hard to say what else is mis-matched. Pictures with the front wheels off would be good too.

[NeoJuice]

So what year carpet should I order for the interior? I'll get pictures of the front end this weekend when I have time and post those pictures as well. Also might come in handy to know what year bench seat I have as well so I can order the proper cover.

This truck is definitely a frankentruck. Look at the VIN tag options lol.

[68Gold/white]

The crpet choice will depend upon which transmission tunnel you have. There's a low and high hump. the high hump can be removed by removing the bolts on the perimeter of the cover. The low hump is part of the floor, it does not remove.

You control arms are 73-up type.

Does it have leaf springs in rear?

As mentioned above, picture of front brakes with wheel off would be nice.

I sold auto parts from 1985 to 1998. The Wagner brake parts catalog lists disc brakes as an option in 1970. I started thread concerning this. Not one single person here had seen OR heard of a 1970 C-10 with disc brakes......If it was an option it must have been rare as hens teeth.
I wonder if where was a list of options for 1970 stuff, and if one still exists?

[NeoJuice]

The trans should be a TH350 with a low hump. Yes there is leaf springs in the rear. I'll try to get some pictures posted up this weekend of the front wheels off.

The VIN is on the drivers side inner fender. I tried to look on the dash for the VIN but its covered up by the dash pad. That will need to be removed and checked if it's even there. This frankentruck is definitely an odd ball. All that matters I guess is the VIN on the inner fender matches the bill of sale which is does.

Will report back soon.

[SCOTI]

That truck has the correct era control arms up front. The 'car' style rubber bushings are easily visible.....

It's most likely someone snagged the disc set-up for an earlier truck & simply swapped the drum brake parts (spindle, hub, brake parts) into place to keep it a roller.

[Keith Seymore]

Originally Posted by NeoJuice

Well I bought the truck. I think I bought a Frankenstein that I'm not sure what combinations of year the truck really is.

Here is the steering box pictures. Hope this is good enough.

Also here is the gas filler necks. I feel like its missing something because shouldn't a 75 have the twist off gas caps that at integrated into the box sides and not the flip out door? Also there is no gas tank switch on the dash even though it has dual tanks. There are two toggle switches under the dash on the left hand side. I can get pictures of that later.

Missing the plastic adapter cups that mate the fill pipe to the box.

Def should be twist off caps rather than gas doors -

AND -

based on the SPID label the original truck had RPO E81 - wooden bed floor. Kinda rare and distinctive.

K

[Keith Seymore]

Originally Posted by NeoJuice

So what year carpet should I order for the interior? I'll get pictures of the front end this weekend when I have time and post those pictures as well. Also might come in handy to know what year bench seat I have as well so I can order the proper cover.

This truck is definitely a frankentruck. Look at the VIN tag options lol.

Also from the SPID -

CCY1451
where "5" = 75 model year
"1" = Oshawa Ontario assembly plant, including RPO Z49 Canadian emissions and content.

P13 bed mount spare

No mention of dual tanks.

My guess is the cab and frame are original and the box has been swapped at some point.

The VIN on the SPID label is interesting but the official VIN is the one rivetted to the cab (either in the door opening or on the dash sheet metal). There should be a hidden partial VIN on the frame rail near the fuel tank (top side of the upper flange) and Oshawa was one of the few truck plants that added a hidden VIN under the heater box. You might check there during your travels.

K

[Keith Seymore]

Originally Posted by 68Gold/white

I sold auto parts from 1985 to 1998. The Wagner brake parts catalog lists disc brakes as an option in 1970. I started thread concerning this. Not one single person here had seen OR heard of a 1970 C-10 with disc brakes......If it was an option it must have been rare as hens teeth.
I wonder if where was a list of options for 1970 stuff, and if one still exists?

Disc were not available in 1970 for C/K truck (or G van).

As I mentioned in Post #17 - I have the brake charts all the way back to 1969 ('69 and '70 are hand written). These are the charts the engineers created and referred to release the part numbers to production and service. They do not show discs as available.

1970 Truck option content can be found here:

https://www.gm.com/content/dam/compa...olet-Truck.pdf

K

[NeoJuice]

Originally Posted by Keith Seymore

Missing the plastic adapter cups that mate the fill pipe to the box.

Def should be twist off caps rather than gas doors -

AND -

based on the SPID label the original truck had RPO E81 - wooden bed floor. Kinda rare.

K

I'm assuming the the plastic adapter cups are only available from LMC Truck? Ya that's what my brother said about the wood box is a rare option. I'll get the truck front end pic's this weekend.

[dagnabbitt]

More pics please!

Not a lot of 75's survived our winters and farm life in general. I am sure there is nothing nefarious about the truck, just passed through a lot of hands, some wanted to build it and some wanted to strip it.

[NeoJuice]

Originally Posted by dagnabbitt

More pics please!

Not a lot of 75's survived our winters and farm life in general. I am sure there is nothing nefarious about the truck, just passed through a lot of hands, some wanted to build it and some wanted to strip it.

dagnabbitt,

Nice to see a local on the forum. I'm out in Beaumont. I will get more pictures this weekend. I will eventually start a build thread as well.

[dagnabbitt]

I work in Leduc, so pretty close. Look forward to that thread!

[NeoJuice]

So little update on the truck. I had a little time on the weekend and pulled the wheels off the front and wah-la! It has front disc brakes on it. Everything is rusted bad an needs to be replaced so now it's time to build a parts list. Thank you for everyone contributing to this post.