63 GMC v6 in a 63 C10?

[Isaiah92260]

Found a sweet deal. Someone wants to sell a 305 V6 and can deliver

http://sandiego.craigslist.org/nsd/pts/5758252237.html


Have a couple questions for the GMC V6 gurus....
Is it possible to install this motor into my 63 Chevy c10? And link it up to a 3 on the tree tranny?

I'm assuming that I'll need to change the motor mounts, where can I find the right ones? And radiator? I currently have a 67 250 I6 with a I6 aluminum champion radiator. And is there anything else I would need to know?
I think the alternators are on the passenger side of the motor, so I'm gonna have to figure out how to re wire the charging system?

And this motor was pulled from a 63 dump truck, the guy told me that it ran great before he pulled it out, but it scary to drop it in mine without knowing if it needs a immediate rebuild or can last for another few years.

Thanks guys!
Posted via Mobile Device

[Isaiah92260]

I'm going to ask the guy for a compression test... What are the numbers I should look for?
Posted via Mobile Device

[TJ's Chevy]

Alright, so let's start with the Motor.

You'll want to look for 125 PSI in all 6 cylinders and now less than 105 in any of them. Also want to turn the engine by hand to make sure it spins freely and has no stiff spots. Pull the valve covers and make sure all rocker arms are moving as they should. Doing a light rebuild on these is pretty cheap, but the parts are getting a tad hard to find. That price is a steal if the engine is good.

Now, Your perches might work, but they will need to be moved no doubt. New motor mounts can be purchased that are single stud instead of double like stock and under $10.

That engine may have the larger truck bell housing so you'll want to look into that. Also take a gander at the numbers on the top of the block in front of the passenger side head, that may be a 351C, or E.

Will bolt up to the 3 speed with a light duty bell housing. Another thing to remember, These engines used a special clutch disc and pressure plate. The disc is NOT available. But a kit is available that has a disc that is close, but will need some modding which can be done easily enough but is just annoying.

You will also need a different thermostat housing, rad hoses, and you'll have to move the regulator to the passenger side.

Other than the fact is weighs 800 pounds and is a bear to move around...you should be good. Keep in mind also...the flywheel and clutch assy have to come off before the bell housing will. That's the stupid pos design flaw in these engines.

[jtrichard]

TJ please EXPLAIN "Another thing to remember, These engines used a special clutch disc and pressure plate. The disc is NOT available."

[TJ's Chevy]

Originally Posted by jtrichard

TJ please EXPLAIN "Another thing to remember, These engines used a special clutch disc and pressure plate. The disc is NOT available."

The GMC clutch was flush on the flywheel side while the chevy clutch had a nub on the flywheel side. Best explained in this video:

https://www.youtube.com/watch?v=-D7fyFKNs4g

[Isaiah92260]

Originally Posted by TJ's Chevy

The GMC clutch was flush on the flywheel side while the chevy clutch had a nub on the flywheel side. Best explained in this video:

https://www.youtube.com/watch?v=-D7fyFKNs4g

Tj thank you so much! I really appreciate it! I am going to remember all of this, and the guy sent me pictures, I has everything! And I am going to assume that the motor has the larger bell housing because he said it was a 4000 model truck, it might just end up passing because I found another guy that has another v6 that he guarantees has less than 80,000 miles on it and doesn't need a rebuild, he wants $500 for it, I'm gonna go check it out soon. Thank you for all the info..... For the motor mounts, can u explain a bit more?
Posted via Mobile Device

[TJ's Chevy]

Originally Posted by Isaiah92260

Tj thank you so much! I really appreciate it! I am going to remember all of this, and the guy sent me pictures, I has everything! And I am going to assume that the motor has the larger bell housing because he said it was a 4000 model truck, it might just end up passing because I found another guy that has another v6 that he guarantees has less than 80,000 miles on it and doesn't need a rebuild, he wants $500 for it, I'm gonna go check it out soon. Thank you for all the info..... For the motor mounts, can u explain a bit more?
Posted via Mobile Device

Is that the 351 on C/L I saw awhile back for $500 still in the truck? If so, be sure to have him take you for a ride in it. $500 for just a motor is fairly spendy. I paid $500 for a whole darn running truck. haha Motor mounts best explained here:
http://67-72chevytrucks.com/vboard/s...d.php?t=574261

The Napa mounts are the ones you want. Pay close attention to the perches as well.

[Isaiah92260]

Originally Posted by TJ's Chevy

Is that the 351 on C/L I saw awhile back for $500 still in the truck? If so, be sure to have him take you for a ride in it. $500 for just a motor is fairly spendy. I paid $500 for a whole darn running truck. haha Motor mounts best explained here:
http://67-72chevytrucks.com/vboard/s...d.php?t=574261

The Napa mounts are the ones you want. Pay close attention to the perches as well.

I believe so, this guy has both a 351 and a 305... I'll post the link

https://losangeles.craigslist.org/la...708436450.html

$500 might be too much? Hmm well I have to see it, out here in Cali everything is expensive lol
Posted via Mobile Device

[TJ's Chevy]

Find out if it's a 351C, E, or Magnum. The Magnum is the most desirable. Bigger 2 barrel, heads, and manifolds. If it's a solid motor $500 isn't to bad I guess. Cheaper than the 478 I am looking at will probably be! haha

[Isaiah92260]

Originally Posted by TJ's Chevy

Find out if it's a 351C, E, or Magnum. The Magnum is the most desirable. Bigger 2 barrel, heads, and manifolds. If it's a solid motor $500 isn't to bad I guess. Cheaper than the 478 I am looking at will probably be! haha

The owner told me that the 351 is a 1968.
And the 305 is a 66. Both running condition.
How do I know of that 68 is one of those you said are desirable?
Posted via Mobile Device

[TJ's Chevy]

Originally Posted by Isaiah92260

The owner told me that the 351 is a 1968.
And the 305 is a 66. Both running condition.
How do I know of that 68 is one of those you said are desirable?
Posted via Mobile Device

On the front of the motor near the passenger side head will be an engine stamp that will tell you the cubic inch and what series it was...in this case C,E or Magnum. Picture:

http://www.6066gmcguy.com/engines/Number-305E.jpg

[duallyjams]

Another important fact you want to look out for the big truck V6 front timing cover / water pump location is different from a pick up truck V6.
Here is a 401M out of a big truck, notice the magnum bigger exhaust manifolds

Here is a 305 in a pick up truck/ you can see the difference in the water pump location

[Isaiah92260]

Originally Posted by duallyjams

Another important fact you want to look out for the big truck V6 front timing cover / water pump location is different from a pick up truck V6.
Here is a 401M out of a big truck, notice the magnum bigger exhaust manifolds
Attachment 1566445
Here is a 305 in a pick up truck/ you can see the difference in the water pump location
Attachment 1566446

Thank you very much for the pictures and the side by side comparison! I think I'm gonna go for the 305.
Btw, what in the heck is with all the plaid valve covers on these v6's I keep seeing?? Lol
Posted via Mobile Device

[Isaiah92260]

Originally Posted by TJ's Chevy

On the front of the motor near the passenger side head will be an engine stamp that will tell you the cubic inch and what series it was...in this case C,E or Magnum. Picture:

http://www.6066gmcguy.com/engines/Number-305E.jpg

Thanks bud, I tried asking the guy for the part numbers but I guess it turned him off because he isn't replying to me anymore. I might take the gamble on the dump truck 63' 305. Just a little nervous about it though, I know that motor is probably worn out and I don't have any experience on doing rebuilds myself but I might try to learn and do it as a project since my straight 6 is still running
Posted via Mobile Device

[TJ's Chevy]

If you need help/info rebuilding the beast; let me know as I just got done with one. haha I would recommend subscribing here:

http://6066gmcclub.com/index.php

Lotta good info there as we are a v6 club. There are several stories about the plaid valve covers. lol

[Isaiah92260]

Originally Posted by TJ's Chevy

If you need help/info rebuilding the beast; let me know as I just got done with one. haha I would recommend subscribing here:

http://6066gmcclub.com/index.php

Lotta good info there as we are a v6 club. There are several stories about the plaid valve covers. lol

Thank you you so much buddy, I'll make sure to do that! I'm gonna try to schedule to meet up with both guys and look at the motors soon! I'll be reporting back!
Posted via Mobile Device

[VictoriaHardware]

Originally Posted by Isaiah92260

the guy told me that it ran great before he pulled it out,Posted via Mobile Device

ALL cars ran great when they were parked if you are the seller.

[TJ's Chevy]

Originally Posted by VictoriaHardware

ALL cars ran great when they were parked if you are the seller.

My 66 ran great before I pulled it. SIKE!!!