'78 GMC plow truck restomod - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1978 GMC Plowboy · 02-21-2012, 03:00 PM

Here's my 1978 GMC K25 4x4 I bought back in October

It has a 4-bolt main 350, Muncie SM465 transmission, NP250 transfer case, Dana 44 front axle and a 14-bolt full floater rear. Cab is completely shot but the frame is immaculate so I forked over $500 and trailered it home with only 3 wheels turning.

1978 GMC Plowboy · 02-21-2012, 03:15 PM

Not pretty, but it had potential

1978 GMC Plowboy · 02-21-2012, 08:13 PM

The day after I got it home I started cleaning all the sh*t out of the bed (believe me there was a LOT) and Lo and Behold!! A matching set of 16.5 American Racing steel wheels buried under that mess!

Pop's C-10 · 02-21-2012, 08:21 PM

8 lugs..3 peddle's..i like it..

1978 GMC Plowboy · 02-21-2012, 09:23 PM

Over the next few weeks I started taking things apart. The first big day in the project came when I brought home the new cab. The picture is very dark but you can still see the cab in the back of my old Mopar

1978 GMC Plowboy · 02-21-2012, 09:36 PM

Sorry the pictures didn't get attached to the last post

crewcabshorty · 02-21-2012, 09:50 PM

looks like a good project ! what is your plan ?

1978 GMC Plowboy · 02-21-2012, 09:51 PM

The next step was to take the bed off. You won't believe how clean the frame is. And here's my two old girls <3

1978 GMC Plowboy · 02-21-2012, 09:54 PM

Quote:

Originally Posted by crewcabshorty

looks like a good project ! what is your plan ?

The plan is to jack it up 6 inches and make it a pulling/mud truck. Basically it's getting redone from the tires up to the cab lights.

motornut · 02-21-2012, 11:43 PM

hi,sounds like fun gotta love real steel eh

1978 GMC Plowboy · 03-28-2012, 11:08 PM

Update: Pulled the motor and tranny, degreased the frame (frame is now about half painted)

Scored a freshly rebuilt motor with 11:1 flat tops and a pretty hot cam for $400. The bad economy sure is nice when you're buying!

I also have a recently rebuilt 2wd Muncie transmission and a NP205 out of an International Travelall, so these will be going in the truck. Anyone ever done a divorced transfer case sawp?

1978 GMC Plowboy · 06-07-2012, 12:15 AM

I had never looked up the casting numbers on the original block - 3951511 - yes folks it's a 400! Damn and the replacement I bought is a 350

Zebb · 06-07-2012, 09:05 AM

Your still good. You just need a different flywheel and balancer.

02-21-2012, 03:00 PM	#1
1978 GMC Plowboy Registered User Join Date: Feb 2012 Location: Waterbury, CT Posts: 14	'78 GMC plow truck restomod Here's my 1978 GMC K25 4x4 I bought back in October It has a 4-bolt main 350, Muncie SM465 transmission, NP250 transfer case, Dana 44 front axle and a 14-bolt full floater rear. Cab is completely shot but the frame is immaculate so I forked over $500 and trailered it home with only 3 wheels turning.

02-21-2012, 03:15 PM	#2
1978 GMC Plowboy Registered User Join Date: Feb 2012 Location: Waterbury, CT Posts: 14	Re: '78 GMC plow truck restomod Not pretty, but it had potential Attached Images

02-21-2012, 08:13 PM	#3
1978 GMC Plowboy Registered User Join Date: Feb 2012 Location: Waterbury, CT Posts: 14	Re: '78 GMC plow truck restomod The day after I got it home I started cleaning all the sh*t out of the bed (believe me there was a LOT) and Lo and Behold!! A matching set of 16.5 American Racing steel wheels buried under that mess! Attached Images __________________ 1986 Dodge D250 1978 GMC K2500 1963 Chevy C30 rack body ...all 4-speed equipped!

02-21-2012, 08:21 PM	#4
Pop's C-10 Registered User Join Date: Jul 2010 Location: memphis Posts: 2,537	Re: '78 GMC plow truck restomod 8 lugs..3 peddle's..i like it.. __________________ 1981 C-10 (Pop's) 1978 Camaro 2006 Lacrosse

02-21-2012, 09:23 PM	#5
1978 GMC Plowboy Registered User Join Date: Feb 2012 Location: Waterbury, CT Posts: 14	Re: '78 GMC plow truck restomod Over the next few weeks I started taking things apart. The first big day in the project came when I brought home the new cab. The picture is very dark but you can still see the cab in the back of my old Mopar __________________ 1986 Dodge D250 1978 GMC K2500 1963 Chevy C30 rack body ...all 4-speed equipped!

02-21-2012, 09:36 PM	#6
1978 GMC Plowboy Registered User Join Date: Feb 2012 Location: Waterbury, CT Posts: 14	Re: '78 GMC plow truck restomod Sorry the pictures didn't get attached to the last post Attached Images __________________ 1986 Dodge D250 1978 GMC K2500 1963 Chevy C30 rack body ...all 4-speed equipped!

02-21-2012, 09:50 PM	#7
crewcabshorty Registered User Join Date: Jan 2012 Location: greenville pa 16125 Posts: 283	Re: '78 GMC plow truck restomod looks like a good project ! what is your plan ?

02-21-2012, 09:51 PM	#8
1978 GMC Plowboy Registered User Join Date: Feb 2012 Location: Waterbury, CT Posts: 14	Re: '78 GMC plow truck restomod The next step was to take the bed off. You won't believe how clean the frame is. And here's my two old girls <3 Attached Images __________________ 1986 Dodge D250 1978 GMC K2500 1963 Chevy C30 rack body ...all 4-speed equipped!

02-21-2012, 11:43 PM	#10
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: '78 GMC plow truck restomod hi,sounds like fun gotta love real steel eh __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350

03-28-2012, 11:08 PM	#11
1978 GMC Plowboy Registered User Join Date: Feb 2012 Location: Waterbury, CT Posts: 14	Re: '78 GMC plow truck restomod Update: Pulled the motor and tranny, degreased the frame (frame is now about half painted) Scored a freshly rebuilt motor with 11:1 flat tops and a pretty hot cam for $400. The bad economy sure is nice when you're buying! I also have a recently rebuilt 2wd Muncie transmission and a NP205 out of an International Travelall, so these will be going in the truck. Anyone ever done a divorced transfer case sawp? __________________ 1986 Dodge D250 1978 GMC K2500 1963 Chevy C30 rack body ...all 4-speed equipped!

06-07-2012, 12:15 AM	#12
1978 GMC Plowboy Registered User Join Date: Feb 2012 Location: Waterbury, CT Posts: 14	Re: '78 GMC plow truck restomod I had never looked up the casting numbers on the original block - 3951511 - yes folks it's a 400! Damn and the replacement I bought is a 350 __________________ 1986 Dodge D250 1978 GMC K2500 1963 Chevy C30 rack body ...all 4-speed equipped!

06-07-2012, 09:05 AM	#13
Zebb Registered User Join Date: Nov 2011 Location: Dalton, NH Posts: 165	Re: '78 GMC plow truck restomod Your still good. You just need a different flywheel and balancer.



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