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#1 |
Registered User
Join Date: Jul 2017
Location: Olympia, WA
Posts: 6
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67 C30 Motorhome Frame Lowering/Discs
Hey all. Anyone know much about a frame like pictured below? I'm looking at buying this 67 c30 motorhome frame (he is calling it a c30, maybe it's p30/p32?) to use in a hot rod build. I really wanted one with discs already, but I found this one with drums and wondered a few things:
I'd like to do a set of dropped spindles so they would be disc break ready. Will these bolt onto my control arms? Or will I need later model control arms and ball joints, right? For the discs, will I need new hubs or will my hubs work? This is a dually setup. I may not end up with stock brakes. I'm also not likely to use the Eaton rear end unless it's geared around 3.54. I'll look for a 14 bolt or Dana 70/80. The rear would be triangulated on air anyway and frame shortened. Any other input on a frame like this would be appreciated.
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71 C20 402. 104k original. |
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#2 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,964
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Re: 67 C30 Motorhome Frame Lowering/Discs
If you're doing dropped spindles, you'll be doing disc brakes & will need the parts based off of the spindles (73-87; 88-98).
The hubs will also be based off of the spindles/brakes. The a-arms are fairly interchangeable. Since it has the 8-lug wheels, they should work w/the correct BJ's for the spindle application.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#3 |
Who Me?
Join Date: Sep 2010
Location: Royal Palm Beach, FL
Posts: 4,067
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Re: 67 C30 Motorhome Frame Lowering/Discs
Motorhome chassis are usually called P30. They used them for motorhomes and step vans. I have one under my 91 Winnebago.
Im not an expert on the suspension parts, but they are probably the same from C30 to P30. I use RockAuto for a lot of parts look up.
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![]() 1997 Tahoe LT 4D 2WD (DD) 2001 Blazer 4D 2WD 1961 Apache 10 (sold) 1965 C10 Stepper (sold) |
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#4 |
Registered User
Join Date: Jul 2017
Location: Olympia, WA
Posts: 6
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Re: 67 C30 Motorhome Frame Lowering/Discs
Thanks for the input. I did end up picking up the front frame section from a 72 motorhome so now I have the full crossmember, arms, spindles, discs and all. The 67 had a hydraulic ram style power steering and the 72 has powered box.
As far as the delineation in the frames, not sure on the difference between C and P. I know the bread van style is P, but these two had a regular cab on them, not a box type motorhome from my understanding. I'll be taking more measurements for sure. The 67 has the Eaton rear end, which I'll probably part with because it's not as user friendly if I decide I need to re-gear or want to add a limited slip. The 72 also came with the rear clip too, so I have a D80 on that. So basically, the only part of the 67 I'll be using is the frame. Not sure about a front cross member drop or if I'll need to notch the rear but the plan is 4 bags. I don't need to lay frame because the body that's going on it is a 49 International and the side steps hang below the frame. I just want to drop those on the ground. It will be a long, slow build, but I'll document.
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71 C20 402. 104k original. |
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#5 |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,698
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Re: 67 C30 Motorhome Frame Lowering/Discs
Does your 67 frame have the same “indent” in the side for a power steering box, like your 72 frame has?
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#6 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,521
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Re: 67 C30 Motorhome Frame Lowering/Discs
Lot of frame work with a motor chassis for a street rod
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#7 |
Registered User
Join Date: Jul 2017
Location: Olympia, WA
Posts: 6
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Re: 67 C30 Motorhome Frame Lowering/Discs
Oh, I don't know. I'll have to take a look at this. I'm hoping the 72 stuff will bolt right on to the 67 frame. Though, I'll be fabricating a bunch of other stuff, so those modifications are not beyond me.
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71 C20 402. 104k original. |
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#8 |
Registered User
Join Date: Jul 2017
Location: Olympia, WA
Posts: 6
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Re: 67 C30 Motorhome Frame Lowering/Discs
Yes, this will be a lot of work but it beats the amount of work to get the stock 49 International frame where I want. It's a beam axle and the chassis is completely flat, so the motorhome frame has a lot of added suspension clearance to get the frame much lower.
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71 C20 402. 104k original. |
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#9 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,521
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Re: 67 C30 Motorhome Frame Lowering/Discs
For what you are proposing I would think finding a 71-72 frame as a base would be easier and less costly, money and time wise.
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#10 | ||
Registered User
Join Date: Jul 2017
Location: Olympia, WA
Posts: 6
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Re: 67 C30 Motorhome Frame Lowering/Discs
Quote:
Quote:
The problem I ran into when exploring a bit more was that my 72 suspension has the rotors and hubs all one piece. I'm going to need to find a set of dually front disc hubs that have the separate hub and rotor because I want to run the later P30 14.2" rotors. So not back to the drawing board per-se, but who knows. If hub donor is cheap enough, I might end up with a different chassis yet again. Learning as I go here.
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71 C20 402. 104k original. |
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#11 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,521
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Re: 67 C30 Motorhome Frame Lowering/Discs
The frame looks the same as my 69 gmc. It started life as a Class B motorhome until it decided to dry rot and feel victim to my sawzall. Frame is a beast and came rated at 14k gvw
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#12 |
Registered User
Join Date: Jul 2017
Location: Olympia, WA
Posts: 6
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Re: 67 C30 Motorhome Frame Lowering/Discs
Yeah. It's a beast for sure. Perfect for this project. The body donor is a 2.5 ton, so I'd feel wimpy dropping it on a 1/2 ton chassis. lol
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71 C20 402. 104k original. |
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#13 |
Junior Member
![]() Join Date: Apr 2012
Location: SF SD
Posts: 61
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Re: 67 C30 Motorhome Frame Lowering/Discs
Has anyone figured out the best way to lower a 68 C30 motorhome?
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#14 |
Registered User
Join Date: Dec 2012
Location: Temple City
Posts: 3,587
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Re: 67 C30 Motorhome Frame Lowering/Discs
On the Later square body C30's you could swap motor home or P30 spindles onto a C30, and get a 1" lift.
You could measure lower mount to spindle centerline, and see if drip spindles will fit. |
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#15 | |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,964
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Re: 67 C30 Motorhome Frame Lowering/Discs
Quote:
Rear is going to be based on the spring set-up & amount of drop desired.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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