The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-20-2018, 08:09 PM   #1
74CustomK20
Registered User
 
74CustomK20's Avatar
 
Join Date: Oct 2014
Location: Tell City, IN
Posts: 637
Question C30 to 4x4 conversion?

I've been thinking a lot of converting my c30 to a k30. I know the front core support mounts swap and that's what I'll use to center n find where the rear spring bracket mounts go (plan on a 52" spring swap at the time) my problem is the crossmember. Everywhere I read I see people swap em out... Why? Plan on about a 8" lift or so anyway so don't think axle will hit anything... Anyone know why? don't plan on a different trans, keeping a sm465 regardless...
__________________
Big Nate
Carp. Local 224. Buy made in the USA!
03 F350 6.0 Daily Race Truck.
79 C70 366 Project Dump.
74CustomK20 is offline   Reply With Quote
Old 08-20-2018, 08:45 PM   #2
sweetk30
Registered User
 
sweetk30's Avatar
 
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,794
Re: C30 to 4x4 conversion?

8" lift should clear just fine on stripped down 2wd cross member .

look up www.diy4x.com

b52 kit http://diy4x.com/product.php?product...cat=250&page=1

shackle hangers http://diy4x.com/product.php?product...cat=250&page=3

shackles http://diy4x.com/product.php?product...cat=250&page=3

rear will be 3" low as true 4wd frames use a 3" lower hanging front hanger for the leaf rear leaf springs . lots of ways to work around this .

and your 2wd sm465 will be 35 spline rear output and no factory t-case combo come behind this as a direct bolt up combo . so its swap tail shaft / whole trans / or divorced tcase from a dodge or ih or early gm .

and 52 or 56 swap springs in the front take a bit to get dialed in for lots of street time. but cheep way to get 4-5" lift off the bat.
__________________
77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
-----------------------------
HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .

EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
sweetk30 is offline   Reply With Quote
Old 08-20-2018, 10:36 PM   #3
74CustomK20
Registered User
 
74CustomK20's Avatar
 
Join Date: Oct 2014
Location: Tell City, IN
Posts: 637
Re: C30 to 4x4 conversion?

I do have a 465/205 combo with shafts and all ready to go. I also noticed the front hangers we're different from the ones from my k20. Planned on swapping them. I'll definitely check those links out. So the real reason why they swap is just for clearance, and if so what do you mean by stripped down cross member?
__________________
Big Nate
Carp. Local 224. Buy made in the USA!
03 F350 6.0 Daily Race Truck.
79 C70 366 Project Dump.
74CustomK20 is offline   Reply With Quote
Old 08-21-2018, 12:09 PM   #4
sweetk30
Registered User
 
sweetk30's Avatar
 
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,794
Re: C30 to 4x4 conversion?

the rear spring front hanger rivet pattern will prob be different so its drill more holes or just compensate with rear lift components to cover the extra 3"

ya strip all the stuff off you dont need so nothing hits . or you could just do this with a little tweeking . http://www.offroaddesign.com/catalog...rossmember.htm
__________________
77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
-----------------------------
HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .

EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
sweetk30 is offline   Reply With Quote
Old 08-21-2018, 01:08 PM   #5
RADustin
Registered User
 
Join Date: Jun 2017
Location: New Orleans
Posts: 386
Re: C30 to 4x4 conversion?

it'd have to be tall to clear the crossmember free and clear. or just have minimum wheel travel.
__________________
1949 Chevy 3100 P/U
http://67-72chevytrucks.com/vboard/s...d.php?t=302780

1976 GMC Sierra Classic C35 CCSB
http://67-72chevytrucks.com/vboard/s...25#post8188825
RADustin is offline   Reply With Quote
Old 08-21-2018, 03:29 PM   #6
74CustomK20
Registered User
 
74CustomK20's Avatar
 
Join Date: Oct 2014
Location: Tell City, IN
Posts: 637
Re: C30 to 4x4 conversion?

Phew 200 dollars for a crossmember... That would go a long way somewhere else... Guess I can just remove all I need off the factory... Also this will just be more of a farm/mudder. Not a rock crawler... But I'll keep that in mind for sure thanks.
__________________
Big Nate
Carp. Local 224. Buy made in the USA!
03 F350 6.0 Daily Race Truck.
79 C70 366 Project Dump.
74CustomK20 is offline   Reply With Quote
Old 08-21-2018, 04:05 PM   #7
sweetk30
Registered User
 
sweetk30's Avatar
 
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,794
Re: C30 to 4x4 conversion?

i have a k30 with 6" lift now and i dont see why a 2wd crossmember still in there would not clear on a 8" lift kit .
__________________
77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
-----------------------------
HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .

EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
sweetk30 is offline   Reply With Quote
Old 08-21-2018, 04:11 PM   #8
74CustomK20
Registered User
 
74CustomK20's Avatar
 
Join Date: Oct 2014
Location: Tell City, IN
Posts: 637
Re: C30 to 4x4 conversion?

My thoughts too. I can source a TRUE one ton 4x4 frame but it's about 500 bucks and would really rather not... Now I just need to find a k10 frame and source my brackets!
__________________
Big Nate
Carp. Local 224. Buy made in the USA!
03 F350 6.0 Daily Race Truck.
79 C70 366 Project Dump.
74CustomK20 is offline   Reply With Quote
Old 08-21-2018, 06:24 PM   #9
sweetk30
Registered User
 
sweetk30's Avatar
 
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,794
Re: C30 to 4x4 conversion?

500 bucks for a clean k30 frame ......... i would jump on that in a heart beat .

i wated over 2-3 years for a k30 frame . then my current one i used a crew cab frame i had and cut it down to a std cab frame cause i couldnt find one .

you will be time / money ahead if you ask me in getting the k30 frame . build the roller out then body swap .
__________________
77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
-----------------------------
HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .

EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
sweetk30 is offline   Reply With Quote
Old 08-21-2018, 07:32 PM   #10
Mathew21
Registered User
 
Mathew21's Avatar
 
Join Date: May 2010
Location: Clinton township, MI
Posts: 1,192
Re: C30 to 4x4 conversion?

Quote:
Originally Posted by sweetk30 View Post
500 bucks for a clean k30 frame ......... i would jump on that in a heart beat .

i wated over 2-3 years for a k30 frame . then my current one i used a crew cab frame i had and cut it down to a std cab frame cause i couldnt find one .

you will be time / money ahead if you ask me in getting the k30 frame . build the roller out then body swap .
I agree I would jump on that frame.
__________________
It only has original paint once
Mathew21 is offline   Reply With Quote
Old 08-21-2018, 11:13 PM   #11
74CustomK20
Registered User
 
74CustomK20's Avatar
 
Join Date: Oct 2014
Location: Tell City, IN
Posts: 637
Re: C30 to 4x4 conversion?

You guys are talking me into it... I could always just pick up axles n still drive my c30 getting parts as needed... Plus the k30 is a conventional wheelbase, not this 5" or so longer crap of the c&c
__________________
Big Nate
Carp. Local 224. Buy made in the USA!
03 F350 6.0 Daily Race Truck.
79 C70 366 Project Dump.
74CustomK20 is offline   Reply With Quote
Old 08-22-2018, 11:26 AM   #12
sweetk30
Registered User
 
sweetk30's Avatar
 
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,794
Re: C30 to 4x4 conversion?

Quote:
Originally Posted by 74CustomK20 View Post
You guys are talking me into it... I could always just pick up axles n still drive my c30 getting parts as needed... Plus the k30 is a conventional wheelbase, not this 5" or so longer crap of the c&c
std cab long bed = 131.5
std cab c&c = 135

just to clearify for others .

my friend has a c&C with a long bed box on it and box centered over the axle and to the untrained eye you would never know it .
__________________
77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
-----------------------------
HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .

EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
sweetk30 is offline   Reply With Quote
Old 08-23-2018, 08:18 PM   #13
74CustomK20
Registered User
 
74CustomK20's Avatar
 
Join Date: Oct 2014
Location: Tell City, IN
Posts: 637
Re: C30 to 4x4 conversion?

I've thought of putting a long bed on mine too... Anyone have pictures of how a c&c dually axle fits under a regular bed? I've heard (I think) the inner wheels will rub the wheel wells, but don't remember... Maybe I can run some nice singles...
__________________
Big Nate
Carp. Local 224. Buy made in the USA!
03 F350 6.0 Daily Race Truck.
79 C70 366 Project Dump.
74CustomK20 is offline   Reply With Quote
Old 08-23-2018, 08:34 PM   #14
sweetk30
Registered User
 
sweetk30's Avatar
 
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,794
Re: C30 to 4x4 conversion?

dont rub as far as i have seen . seen pics of a few 2wd trucks this way . the outer wheel just needs a rubber wheel arch mud flapy extension to cover the wheel .

its some times called a sleeper dually / stelth dually .
__________________
77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
-----------------------------
HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .

EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
sweetk30 is offline   Reply With Quote
Old 08-31-2018, 07:48 PM   #15
Devilman
Registered User
 
Join Date: Feb 2016
Location: Dallas, Tx
Posts: 41
Re: C30 to 4x4 conversion?

Quote:
Originally Posted by 74CustomK20 View Post
My thoughts too. I can source a TRUE one ton 4x4 frame but it's about 500 bucks and would really rather not... Now I just need to find a k10 frame and source my brackets!
I was gonna convert my 2wd frame for my crew but found clean K30 crew frame for $300 and jumped all over it
Devilman is offline   Reply With Quote
Old 09-24-2018, 11:39 PM   #16
Danvis
Registered User
 
Danvis's Avatar
 
Join Date: Sep 2018
Location: New market
Posts: 11
Re: C30 to 4x4 conversion?

Quote:
Originally Posted by 74CustomK20 View Post
I've thought of putting a long bed on mine too... Anyone have pictures of how a c&c dually axle fits under a regular bed? I've heard (I think) the inner wheels will rub the wheel wells, but don't remember... Maybe I can run some nice singles...
Id like to see pics also
__________________
1982 K10 350/sm465/205
2009 Silverado CCSB Z71 4x4 LT2 5.3
2008 Yukon Denali 6.2 AWD (BABY MOVER)
1983 K20 lwb 350/sm465/205....big nasty....sold....
1986 GMC Sierra Classic 350 auto...sold
1998 Silverado extended cab z71 4x4 (first truck)
Danvis is offline   Reply With Quote
Reply

Bookmarks

Tags
4x4 swap, c30 to k30, frame swap?


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 10:31 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com