68 GMC K20 with V6 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

robby · 04-30-2003, 10:52 PM

There is a 68 K20 GMC with the big V6 four speed and no other apparent options, all the windows are shot out and the owner says it runs. My question is since I may be able to get it cheap, how hard is a small block swap? Can I use the flywheel? How about motor mounts? Is the V6 worth anything?
Thanks

benwantland · 04-30-2003, 11:22 PM

the v6's are pretty tough, you can get a lot more info on them here: http://www.6066gmctrucks.org/305V6.htm

Longhorn Man · 04-30-2003, 11:42 PM

A small block will bolt in...but you'll need the mounts, towers, flywheel...pretty much everything north of the tranny.

Erl · 05-01-2003, 09:32 AM

Does the engine have an air cleaner and all the connecting accessories on it? If so, I need those items to bring my 305V6 back to stock. I would be interested in buying that stuff. Let me know the status.
Thanks

robby · 05-02-2003, 11:27 PM

I talked to the guy and he said it has 70,000 miles and no rust. He wants $1,000 with another 69 parts truck. I think he'll take less.

Longhorn Man · 05-02-2003, 11:44 PM

If the windows being shot out is the worst thing...and it comes with a parts truck (asuming it has glass) I say jump on it.

dinnut · 05-03-2003, 12:38 AM

thats a hell of a deal... i paid 800 for my 72. it has a lot of rust. (rockers, floorboard, tailgate, plus more) and a 350 v8 with a th350 behind it. GET IT!

robby · 05-03-2003, 11:24 AM

The parts truck does have glass and not much else of any value. I may get this one but I need to sell the 79 first after I yank the motor

robby · 05-03-2003, 11:26 AM

Longhorn-can I use the same bellhousing? Bolt pattern the same on the 305 v6 as chevy?? And Erl yes it has everything on top of the motor original

robby · 05-03-2003, 05:14 PM

this truck has no power steering, anybody know how to do the pump set up? also will the power steering box off of my 79 K20 fit on the 68 k20? How about the front and rear axle?

Longhorn Man · 05-03-2003, 11:09 PM

I can't say on the bellhousing. I can look at one in a junk yard...but honestly i won't get to go untill AT LEAST friday...maybe not even then.

robby · 05-04-2003, 07:05 PM

went back to look today, found the rust-Dang! Another wierd note, it has a power steering box on it but no pump and the box has a thick shim betwixt it and the frame

Longhorn Man · 05-04-2003, 11:15 PM

I'll bet the frame does not have the proper dimple in it for the power steering gear box. that is why the shims are there. This can really mess up the gear box sticking out like that.

Erl · 05-05-2003, 04:57 PM

I have a 305 V6 here at the office on a stand, so I could take some measurements and/or pictures. I believe the bell housing is the same as a chevy small block. Longhornmail is right about the power steering. The frame needs to be indented for the steering gear box to fit correctly. How about some pictures of the truck and the engine bay.

TP from Cntl PA · 05-05-2003, 06:06 PM

Doesn't sound like a bad truck at all! I paid $750 for my 1-ton '69 3500 t-tag.........I like the v-6 even though it is a tad thirsty. I guess if you want all the horses you have to feed them! When I bought it I thought it was a big block V-8 but couldn't understand where the spark plugs were(I couldn't see the coil with the air cleaner set-up on it to tell it was a six). I like popping the hood and hearing it idle.........sounds like a German D310 IH Diesel in my neighbors IH 756!

robby · 05-05-2003, 10:44 PM

probably not a bad project but I gotta prioritize. Can't get any pics now, sorry.

Longhorn Man · 05-05-2003, 11:25 PM

I fyou can take 35mm pics or something like that and snail mail them to me I can scan them and post them if you want.
PM me for my addy if your interested.

04-30-2003, 10:52 PM	#1
robby Semper Fidelis Join Date: Dec 2001 Location: Cedar City, Utah Posts: 654	68 GMC K20 with V6 There is a 68 K20 GMC with the big V6 four speed and no other apparent options, all the windows are shot out and the owner says it runs. My question is since I may be able to get it cheap, how hard is a small block swap? Can I use the flywheel? How about motor mounts? Is the V6 worth anything? Thanks __________________ 72 Chevy C 20 with 402 For sale 85 GMC K2500 83 Trans Am Cedar City, Utah (Missouri Native)

04-30-2003, 11:22 PM	#2
benwantland Registered User Join Date: Oct 2002 Location: Iowa Posts: 71	the v6's are pretty tough, you can get a lot more info on them here: http://www.6066gmctrucks.org/305V6.htm Last edited by benwantland; 04-30-2003 at 11:44 PM.

05-01-2003, 09:32 AM	#4
Erl Registered User Join Date: Mar 2002 Location: Dallas, TX Posts: 555	Does the engine have an air cleaner and all the connecting accessories on it? If so, I need those items to bring my 305V6 back to stock. I would be interested in buying that stuff. Let me know the status. Thanks __________________ 1968 GMC 305 V6 3/4 4x4 Stepside 06 Corvette Daily Driver Dallas TX

05-02-2003, 11:27 PM	#5
robby Semper Fidelis Join Date: Dec 2001 Location: Cedar City, Utah Posts: 654	I talked to the guy and he said it has 70,000 miles and no rust. He wants $1,000 with another 69 parts truck. I think he'll take less. __________________ 72 Chevy C 20 with 402 For sale 85 GMC K2500 83 Trans Am Cedar City, Utah (Missouri Native)

05-03-2003, 12:38 AM	#7
dinnut Registered User Join Date: Apr 2003 Location: missouri city, tx Posts: 4,486	thats a hell of a deal... i paid 800 for my 72. it has a lot of rust. (rockers, floorboard, tailgate, plus more) and a 350 v8 with a th350 behind it. GET IT! __________________ 70 longbed 496/th400/Ford 9"

04-30-2003, 11:42 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	A small block will bolt in...but you'll need the mounts, towers, flywheel...pretty much everything north of the tranny.

05-02-2003, 11:44 PM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	If the windows being shot out is the worst thing...and it comes with a parts truck (asuming it has glass) I say jump on it.

05-03-2003, 11:24 AM	#8
robby Semper Fidelis Join Date: Dec 2001 Location: Cedar City, Utah Posts: 654	The parts truck does have glass and not much else of any value. I may get this one but I need to sell the 79 first after I yank the motor __________________ 72 Chevy C 20 with 402 For sale 85 GMC K2500 83 Trans Am Cedar City, Utah (Missouri Native)

05-03-2003, 11:26 AM	#9
robby Semper Fidelis Join Date: Dec 2001 Location: Cedar City, Utah Posts: 654	Longhorn-can I use the same bellhousing? Bolt pattern the same on the 305 v6 as chevy?? And Erl yes it has everything on top of the motor original __________________ 72 Chevy C 20 with 402 For sale 85 GMC K2500 83 Trans Am Cedar City, Utah (Missouri Native)

05-03-2003, 05:14 PM	#10
robby Semper Fidelis Join Date: Dec 2001 Location: Cedar City, Utah Posts: 654	this truck has no power steering, anybody know how to do the pump set up? also will the power steering box off of my 79 K20 fit on the 68 k20? How about the front and rear axle? __________________ 72 Chevy C 20 with 402 For sale 85 GMC K2500 83 Trans Am Cedar City, Utah (Missouri Native)

05-03-2003, 11:09 PM	#11
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I can't say on the bellhousing. I can look at one in a junk yard...but honestly i won't get to go untill AT LEAST friday...maybe not even then.

05-04-2003, 07:05 PM	#12
robby Semper Fidelis Join Date: Dec 2001 Location: Cedar City, Utah Posts: 654	went back to look today, found the rust-Dang! Another wierd note, it has a power steering box on it but no pump and the box has a thick shim betwixt it and the frame __________________ 72 Chevy C 20 with 402 For sale 85 GMC K2500 83 Trans Am Cedar City, Utah (Missouri Native)

05-04-2003, 11:15 PM	#13
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I'll bet the frame does not have the proper dimple in it for the power steering gear box. that is why the shims are there. This can really mess up the gear box sticking out like that.

05-05-2003, 04:57 PM	#14
Erl Registered User Join Date: Mar 2002 Location: Dallas, TX Posts: 555	I have a 305 V6 here at the office on a stand, so I could take some measurements and/or pictures. I believe the bell housing is the same as a chevy small block. Longhornmail is right about the power steering. The frame needs to be indented for the steering gear box to fit correctly. How about some pictures of the truck and the engine bay. __________________ 1968 GMC 305 V6 3/4 4x4 Stepside 06 Corvette Daily Driver Dallas TX

05-05-2003, 06:06 PM	#15
TP from Cntl PA Registered User Join Date: Apr 2003 Location: Central PA....In the Berg of Nisbet Posts: 790	Doesn't sound like a bad truck at all! I paid $750 for my 1-ton '69 3500 t-tag.........I like the v-6 even though it is a tad thirsty. I guess if you want all the horses you have to feed them! When I bought it I thought it was a big block V-8 but couldn't understand where the spark plugs were(I couldn't see the coil with the air cleaner set-up on it to tell it was a six). I like popping the hood and hearing it idle.........sounds like a German D310 IH Diesel in my neighbors IH 756! __________________ '72 K-20 EFI'ed 250 Inline/4spd stake body, Farm Truck '71 C-20 Cummins Diesel Powered, In storage thanks to $5.00 diesel! '69 3500 GMC 305V-6/4spd, Still under reconstruction.......... Inlines Rule! 6 soldiers standing is better than 8 laying down!!!!!!!!



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05-05-2003, 10:44 PM	#16
robby Semper Fidelis Join Date: Dec 2001 Location: Cedar City, Utah Posts: 654	probably not a bad project but I gotta prioritize. Can't get any pics now, sorry. __________________ 72 Chevy C 20 with 402 For sale 85 GMC K2500 83 Trans Am Cedar City, Utah (Missouri Native)

05-05-2003, 11:25 PM	#17
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I fyou can take 35mm pics or something like that and snail mail them to me I can scan them and post them if you want. PM me for my addy if your interested.

Register or Log In To remove these advertisements.