Questions:GMC 305/351 V/6 engines? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

100%Chevy · 11-04-2009, 09:16 PM

What was the original color of these engines?
And mine has the center front mount.Is this the same mount as the I/6?I'm asking about the part on the front of the crossmember that the engine mount sits on.
T.I.A.
Mike.

jonzcustomshop · 11-04-2009, 09:44 PM

The best gmc 6 info I have found is here: www.6066gmcguy.org/

**Corts60** · 11-05-2009, 01:44 AM

They were originally a dull red, which they don't make anymore. I think a lot of guys are using a Ford red that is close to the factory color.

Do you have any pics of the mount?

BobS · 11-05-2009, 10:18 AM

I've used Ford Red, looks fine to me! Not sure on the motor mount but I'd doubt it's the same as on the inline 6. What truck is this in?

Bob

100%Chevy · 11-06-2009, 10:36 AM

It's a 351 out of a large dump truck.I want to put it in a 64 GMC.
It uses the single center front mount,similar to the I/6 center front mount.
I have it on a motor stand to run it,but I'd like to put it in the truck to get it out of the way,so I need to fab a mount for it.Want to paint it first.
There's some pictures in my picturetrail.
Mike.

http://www.picturetrail.com/100chevy

BobS · 11-09-2009, 07:05 PM

The engine in my 5000 mounts that way, 1-ton and below use mounts on the side of the block. It shouldn't be hard to find a set, I'd recommend installing it using the factory setup. I can take some pics if you need them, let me know.

100%Chevy · 11-09-2009, 07:44 PM

BobS,thanks for the pictures offer---Yes,I would like to see the mounts!
I've never seen those that you speak of.
I have a 63 truck with the I/6 front mount.It is 1" longer than I need.So,I could make one if I have to.
My 351 is a 71 or newer engine with an alternator(and pcv).And I have the power steering pump mounted also.Will be using the 60/67 ram style cylinder and valve.Would the mounts interfere with these accessories?
Thanks for your time and help!
Mike.

jbgroby · 11-09-2009, 09:59 PM

the paint that martin senior sells under the duplicolor lable #1406 ford engine red is a very close match my engine is painted in it.

4dranch · 11-10-2009, 09:04 AM

Here's a good shot I have on file of the engine paint...

BobS · 11-10-2009, 03:42 PM

Here's a shot of what the motor mount setup looks like on the driver side, passenger side is similar. The photo above also shows the motor mount on the side of the engine. Second pic is a shot of the two holes where the medium duty truck motor mounts bolt to the block, you can also see the motor mounts on the side of the block and how they mount to the frame, similar to Chevy V-8s.

You shouldn't have any problems finding the correct motor mounts.

Bob

jbgroby · 11-10-2009, 03:53 PM

Here is a good clean shot. The rubber part you see gets bolte into the factory welded frame mount in the second picture.

JRBECK64 · 11-10-2009, 07:47 PM

Quote:

Originally Posted by jbgroby

Here is a good clean shot. The rubber part you see gets bolte into the factory welded frame mount in the second picture.

I was out poking around the Junk Yard today and actually saw one of these Engines in a truck and it looked to be complete. Are these old Engines worth much?

JRBECK64

jbgroby · 11-10-2009, 10:23 PM

If you're a true purest for the GMC yes, but more importantly the added on parts are worth some money. Did the one you see have the Power Steering setup? or other add on? A few members are looking for the PS/PB OEM setup.

Jake

100%Chevy · 11-10-2009, 10:47 PM

BobS shows the bolt on frame mounts and JBGroby shows welded on frame mounts.
Which is which?
Different years?
Which is for a 64 GMC?
I have the bolt on frame mounts already,just don't have the steel that bolts on the engine.I may be able to make those if I can't find any.
These "Old" engines are exactly that.Old.They haven't made them for many years.GMC's only attempt to make a GMC only engine and it worked very well for what they were designed for.
They have hellacious torque and reliability.The fuel mileage sucked.But who cared when gas was around .22 a gallon average in 1960.
The value varies according to which engine you're looking at.There were a lot of different models depending on the year and application.And accessories.
I was offered $500.00 for my 351 C.Not enough for me.
Thanks to all for your time and effort to answer my questions.And I really needed the pictures!
I'm in no hurry on this as I have several projects going and I move around a lot between them.
Mike.

jbgroby · 11-10-2009, 10:51 PM

I know for sure the welded mount were for 1960-61-62. Post a question on the 6066 GMC group, you're sure to get an answer.

http://autos.groups.yahoo.com/group/6066_GMC_Truck/

Club page

http://www.6066gmcguy.org/

Jake

BobS · 11-10-2009, 11:09 PM

I'm guessing the bolt-ins are 66-69, my 65 has the older style but it's a NAPCO and there's no telling what was original on it.

I'd think the 66 style would be the easier ones to put in. I've never checked but I've always figured the 67-69s used the same as the 66. If that's the case I may have an extra set around here. I'll check tomorrow.

Bob

11-04-2009, 09:44 PM	#2
jonzcustomshop 1961 crewcab Join Date: Dec 2007 Location: missoula, mt Posts: 6,164	Re: Questions:GMC 305/351 V/6 engines? The best gmc 6 info I have found is here: www.6066gmcguy.org/ __________________ 60 build: http://67-72chevytrucks.com/vboard/s...d.php?t=280904 61 crew build: http://67-72chevytrucks.com/vboard/s...d.php?t=646830 63 build: http://67-72chevytrucks.com/vboard/s...d.php?t=336537 64 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=448681 65 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=590715 65 build: http://67-72chevytrucks.com/vboard/s...d.php?t=281955

11-05-2009, 01:44 AM	#3
Corts60 Just here to tinker Join Date: Jun 2008 Location: Holland, MI Posts: 3,697	Re: Questions:GMC 305/351 V/6 engines? They were originally a dull red, which they don't make anymore. I think a lot of guys are using a Ford red that is close to the factory color. Do you have any pics of the mount? __________________ 78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold)

11-05-2009, 10:18 AM	#4
BobS Senior Member Join Date: May 2001 Location: West Central Minnesota Posts: 568	Re: Questions:GMC 305/351 V/6 engines? I've used Ford Red, looks fine to me! Not sure on the motor mount but I'd doubt it's the same as on the inline 6. What truck is this in? Bob __________________ V-6....only GMC Trucks have it! 62 GMC W5000 NAPCO-V6 65 GMC 2500 NAPCO Panel-V6 66 GMC 1000-V6 66 GMC 1500-V6 67 GMC K1500-SBC (originally a KM-V6) 68 GMC C1500-V6 68 GMC C1500-V6 68 GMC Suburban C2500 70 Chevy K20-SBC 71 Chevy C30 Longhorn-SBC 72 GMC Suburban C1500-BBC 72 Chevy C10-SBC 72 GMC C5500-ToroFlow Diesel

11-06-2009, 10:36 AM	#5
100%Chevy Registered User Join Date: Jun 2008 Location: Moss Point,Ms. Posts: 1,439	Re: Questions:GMC 305/351 V/6 engines? It's a 351 out of a large dump truck.I want to put it in a 64 GMC. It uses the single center front mount,similar to the I/6 center front mount. I have it on a motor stand to run it,but I'd like to put it in the truck to get it out of the way,so I need to fab a mount for it.Want to paint it first. There's some pictures in my picturetrail. Mike. http://www.picturetrail.com/100chevy Last edited by 100%Chevy; 11-06-2009 at 10:38 AM.

11-09-2009, 07:05 PM	#6
BobS Senior Member Join Date: May 2001 Location: West Central Minnesota Posts: 568	Re: Questions:GMC 305/351 V/6 engines? The engine in my 5000 mounts that way, 1-ton and below use mounts on the side of the block. It shouldn't be hard to find a set, I'd recommend installing it using the factory setup. I can take some pics if you need them, let me know. __________________ V-6....only GMC Trucks have it! 62 GMC W5000 NAPCO-V6 65 GMC 2500 NAPCO Panel-V6 66 GMC 1000-V6 66 GMC 1500-V6 67 GMC K1500-SBC (originally a KM-V6) 68 GMC C1500-V6 68 GMC C1500-V6 68 GMC Suburban C2500 70 Chevy K20-SBC 71 Chevy C30 Longhorn-SBC 72 GMC Suburban C1500-BBC 72 Chevy C10-SBC 72 GMC C5500-ToroFlow Diesel

11-04-2009, 09:16 PM	#1
100%Chevy Registered User Join Date: Jun 2008 Location: Moss Point,Ms. Posts: 1,439	Questions:GMC 305/351 V/6 engines? What was the original color of these engines? And mine has the center front mount.Is this the same mount as the I/6?I'm asking about the part on the front of the crossmember that the engine mount sits on. T.I.A. Mike.

11-09-2009, 07:44 PM	#7
100%Chevy Registered User Join Date: Jun 2008 Location: Moss Point,Ms. Posts: 1,439	Re: Questions:GMC 305/351 V/6 engines? BobS,thanks for the pictures offer---Yes,I would like to see the mounts! I've never seen those that you speak of. I have a 63 truck with the I/6 front mount.It is 1" longer than I need.So,I could make one if I have to. My 351 is a 71 or newer engine with an alternator(and pcv).And I have the power steering pump mounted also.Will be using the 60/67 ram style cylinder and valve.Would the mounts interfere with these accessories? Thanks for your time and help! Mike.

11-09-2009, 09:59 PM	#8
jbgroby Registered User Join Date: Nov 2008 Location: Lacombe, LA Posts: 2,772	Re: Questions:GMC 305/351 V/6 engines? the paint that martin senior sells under the duplicolor lable #1406 ford engine red is a very close match my engine is painted in it. __________________ http://s1299.photobucket.com/user/jb...23904108567829

11-10-2009, 09:04 AM	#9
4dranch Shloooooong bed member #2 Join Date: Aug 2008 Location: Millington Tn. Posts: 1,864	Re: Questions:GMC 305/351 V/6 engines? Here's a good shot I have on file of the engine paint... Attached Images __________________ *David,* Daughters 66 truck: http://67-72chevytrucks.com/vboard/s...d.php?t=484601 Learning to drive a 3 on the tree: http://www.youtube.com/watch?v=CcCMvRgBo1Q

11-10-2009, 03:42 PM	#10
BobS Senior Member Join Date: May 2001 Location: West Central Minnesota Posts: 568	Re: Questions:GMC 305/351 V/6 engines? Here's a shot of what the motor mount setup looks like on the driver side, passenger side is similar. The photo above also shows the motor mount on the side of the engine. Second pic is a shot of the two holes where the medium duty truck motor mounts bolt to the block, you can also see the motor mounts on the side of the block and how they mount to the frame, similar to Chevy V-8s. You shouldn't have any problems finding the correct motor mounts. Bob __________________ V-6....only GMC Trucks have it! 62 GMC W5000 NAPCO-V6 65 GMC 2500 NAPCO Panel-V6 66 GMC 1000-V6 66 GMC 1500-V6 67 GMC K1500-SBC (originally a KM-V6) 68 GMC C1500-V6 68 GMC C1500-V6 68 GMC Suburban C2500 70 Chevy K20-SBC 71 Chevy C30 Longhorn-SBC 72 GMC Suburban C1500-BBC 72 Chevy C10-SBC 72 GMC C5500-ToroFlow Diesel

11-10-2009, 03:53 PM	#11
jbgroby Registered User Join Date: Nov 2008 Location: Lacombe, LA Posts: 2,772	Re: Questions:GMC 305/351 V/6 engines? Here is a good clean shot. The rubber part you see gets bolte into the factory welded frame mount in the second picture. Attached Images __________________ http://s1299.photobucket.com/user/jb...23904108567829 Last edited by jbgroby; 11-10-2009 at 03:53 PM.

11-10-2009, 10:23 PM	#13
jbgroby Registered User Join Date: Nov 2008 Location: Lacombe, LA Posts: 2,772	Re: Questions:GMC 305/351 V/6 engines? If you're a true purest for the GMC yes, but more importantly the added on parts are worth some money. Did the one you see have the Power Steering setup? or other add on? A few members are looking for the PS/PB OEM setup. Jake __________________ http://s1299.photobucket.com/user/jb...23904108567829

11-10-2009, 10:47 PM	#14
100%Chevy Registered User Join Date: Jun 2008 Location: Moss Point,Ms. Posts: 1,439	Re: Questions:GMC 305/351 V/6 engines? BobS shows the bolt on frame mounts and JBGroby shows welded on frame mounts. Which is which? Different years? Which is for a 64 GMC? I have the bolt on frame mounts already,just don't have the steel that bolts on the engine.I may be able to make those if I can't find any. These "Old" engines are exactly that.Old.They haven't made them for many years.GMC's only attempt to make a GMC only engine and it worked very well for what they were designed for. They have hellacious torque and reliability.The fuel mileage sucked.But who cared when gas was around .22 a gallon average in 1960. The value varies according to which engine you're looking at.There were a lot of different models depending on the year and application.And accessories. I was offered $500.00 for my 351 C.Not enough for me. Thanks to all for your time and effort to answer my questions.And I really needed the pictures! I'm in no hurry on this as I have several projects going and I move around a lot between them. Mike.

11-10-2009, 10:51 PM	#15
jbgroby Registered User Join Date: Nov 2008 Location: Lacombe, LA Posts: 2,772	Re: Questions:GMC 305/351 V/6 engines? I know for sure the welded mount were for 1960-61-62. Post a question on the 6066 GMC group, you're sure to get an answer. http://autos.groups.yahoo.com/group/6066_GMC_Truck/ Club page http://www.6066gmcguy.org/ Jake __________________ http://s1299.photobucket.com/user/jb...23904108567829

11-10-2009, 11:09 PM	#16
BobS Senior Member Join Date: May 2001 Location: West Central Minnesota Posts: 568	Re: Questions:GMC 305/351 V/6 engines? I'm guessing the bolt-ins are 66-69, my 65 has the older style but it's a NAPCO and there's no telling what was original on it. I'd think the 66 style would be the easier ones to put in. I've never checked but I've always figured the 67-69s used the same as the 66. If that's the case I may have an extra set around here. I'll check tomorrow. Bob __________________ V-6....only GMC Trucks have it! 62 GMC W5000 NAPCO-V6 65 GMC 2500 NAPCO Panel-V6 66 GMC 1000-V6 66 GMC 1500-V6 67 GMC K1500-SBC (originally a KM-V6) 68 GMC C1500-V6 68 GMC C1500-V6 68 GMC Suburban C2500 70 Chevy K20-SBC 71 Chevy C30 Longhorn-SBC 72 GMC Suburban C1500-BBC 72 Chevy C10-SBC 72 GMC C5500-ToroFlow Diesel



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