New member - just picked up a rare '63

[mechanic58]

I suspect I will end up taking this motor out of the truck and doing something else with it. Might make a good powerplant for a saw mill or something like that. lol

[jbgroby]

Mech,

YOu can change out the carb to a 2 barrle and the rear end for better milage I get 17 now.

[mechanic58]

It already has the 2 barrel and it has a 3.07 rearend.

[jbgroby]

Then I don;t know what the problem is, originally I had aboyut 11 mpg, now up to 17 IF I stay at 65, push it past that and all bets are off.

[padresag]

a holley 500 carb, hei distr and set up would more than likely improve things. as he says he hasn't even had a spark plug out yet
ron

[64fleetside]

Even when gas was less than a dollar a gallon, GMC V6s were known to be guzzlers. If you ever have one apart it is evident why-they are huge and heavy. One valve lifter is about the size of 3 small block chevy lifters, the pistons are about the size of coffee cans and very heavy. For the same reason, they don't like high RPMs. They are torquey, last forever, but drink fuel.

[Shooters_7]

You have to love central Texas for preserving this truck! I'd have snapped that one up quick if I'd had found it! Good luck and would love to see it rebuilt.

[mechanic58]

Originally Posted by jbgroby

Then I don;t know what the problem is, originally I had aboyut 11 mpg, now up to 17 IF I stay at 65, push it past that and all bets are off.

Well - its still way too early for me to speculate what kinda "mileage" its getting. I've only been running the engine with the truck at a stand-still for just a few hours. The last time it ran before last week was sometime in the early 90s.

Originally Posted by padresag

a holley 500 carb, hei distr and set up would more than likely improve things. as he says he hasn't even had a spark plug out yet
ron

Nope, I haven't. I haven't even had the distributor cap off of it yet. I'm still amazed the ignition system works! And speaking of that...even the charging system still works and appears to be 100% original.


I took the bed off of it today. I was dying to get all the rotted wood out of it. I'm going to put 3/4" plywood in it for now. I am kinda planning on just using this old truck to do chores with around here for the time being. I don't think I'm going to waste any time trying to fix the cab. I'll just use it as-is until either I find a better cab thats worthy of a frame-off or I run into someone else that wants it more than me. lol

[jbgroby]

I did the petronix set up, duel intake with holley 500 CFM, 3.23 gears on a Dana 44.

[mechanic58]

"Duel intake" ? Do you mean a 2-barrel intake? My engine is an E model, already has the 2-barrel intake on it.

[jbgroby]

that os gppd, becasue the duel intake is a bear to find, what carb are you running,

[mechanic58]

"os gppd" ??? I still don't know what you're talking about with the "duel intake". My engine is a 305E - its 100% unmolested. It has a 2-barrel intake manifold with a 2-barrel Stromberg carburetor. It runs quite rich.

[jbgroby]

OK, You have the dual intake, you won't need one. I menat to type 'that is good', did not check before clicking reply. All I can tell you is whay I've done to my 305A to change it a bit. If you have not already done so, join Jolly Goodfellows' 6066GMC site.


http://www.6066gmcguy.org/

The club will have the best answers

The yahoo page link for posting questions is

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

Good Luck.
Jake

[dthela]

nice