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#1 |
Registered User
![]() Join Date: Jul 2015
Location: South Orange County CA
Posts: 1,263
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Front Disc brake Conversion and rear end swap on C20
I’m sure many have done this, however, not sure if the best way to go is 5 or 6 lug. A rear end swap is inevitable too, and wondering if the higher gear rear ends are 5 or 6 lug.
Hoping someone could shed some light on possible solutions. The 8 lug wheels are difficult to find, so converting the C20 to a C10 Drivetrain makes sense. Can anyone elaborate on what higher gear rear end would be ideal? |
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#2 |
Moderator
![]() ![]() Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: Front Disc brake Conversion and rear end swap on C20
What year truck again?
__________________
Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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#3 |
Registered User
![]() Join Date: Jul 2015
Location: South Orange County CA
Posts: 1,263
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Re: Front Disc brake Conversion and rear end swap on C20
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#4 |
Senior Member
![]() ![]() ![]() Join Date: Jan 2018
Location: Hickory Flat, GA
Posts: 4,460
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Re: Front Disc brake Conversion and rear end swap on C20
If you are keeping the stock engine and trans, something like a 3.08 would be a good highway gear. If you are going to swap in an overdrive transmission, 3.73s or 4.10s is the way to go. I have 3.73s and and overdrive trans in my truck and I spin around 2200 RPM to go 70mph.
Up until 70, all the factory 1/2 ton stuff was 6 lug. 71 to 87 1/2 ton 2wd is 5 lug. Do you have coil springs or leaf springs in the rear?
__________________
Christian Carpenter 1963 C10 - Frankentruck 283, Muncie 3 speed with overdrive Overdrive wiring here1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 --> Soon to be 350, Saginaw 4 speed 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson |
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#5 | |
Registered User
![]() Join Date: Jul 2015
Location: South Orange County CA
Posts: 1,263
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Re: Front Disc brake Conversion and rear end swap on C20
Quote:
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#6 | |
Registered User
![]() Join Date: Jul 2015
Location: South Orange County CA
Posts: 1,263
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Re: Front Disc brake Conversion and rear end swap on C20
Quote:
Seems like I have to have my spindles machines down to work with 5 lug disc brakes, C10 style. |
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#7 |
Senior Member
![]() ![]() ![]() Join Date: Jan 2018
Location: Hickory Flat, GA
Posts: 4,460
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Re: Front Disc brake Conversion and rear end swap on C20
If you want to run 5 lug, probably your easiest option will be to get a front cross member from a 73-87 so you can have an easier time getting replacement parts. Get the whole thing including the control arms and spindles. Drop spindles for the 1/2 tons are cheaper than the 3/4 tons
For your rear end, does it have trailing arms on the rear? If so, you could use a 71-72 rear end from a coil spring truck and it will bolt up no problem. If you want to use a squarebody rear, CaptainFab sells weld on mounts so you can mount to the trailing arms. 5 lug started in 71 for all half tons
__________________
Christian Carpenter 1963 C10 - Frankentruck 283, Muncie 3 speed with overdrive Overdrive wiring here1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 --> Soon to be 350, Saginaw 4 speed 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson |
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#8 |
Moderator
![]() ![]() Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: Front Disc brake Conversion and rear end swap on C20
Here is a thread on rear ends that fit our trucks - http://67-72chevytrucks.com/vboard/s...d.php?t=562446
I found it in the FAQ section - http://67-72chevytrucks.com/vboard/s...d.php?t=646002 There's even a thread on a 14-bolt conversion in there.
__________________
Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? Last edited by The Rocknrod; 06-14-2020 at 07:01 AM. |
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#9 |
Registered User
![]() Join Date: Jul 2015
Location: South Orange County CA
Posts: 1,263
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Re: Front Disc brake Conversion and rear end swap on C20
Well, I'm still undecided. I guess I have three options:
1. Keep the 16.5 wheels and get new tires. 2. Get 8 lug, 16 inch wheels. 3. Find a conversion kit for the front and a different rear end. At this point, I am good with option 1 or 2; if I keep the truck for a while I may just do the rear end so I have a taller gear. Option 3 is probably going to cost a pretty penny. |
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