GMC 3 speed 305 V6 Mileage?

[1960_GMC]

Hey guys,

I am new to the game of fixing up rides, and i am about to trade my daily driver for a 1960 GMC with a factory 3 speed and a 305 V6. I know for a fact that 3 speeds are geared for torque, but is there any way i can improve its high end so it can be my daily driver, and have it not get absolutely terrible gas mileage on the high way?

Thanks
1960_GMC

[jbgroby]

Yes, You might consider changing to a two barrle carb. set up Holley 500 CFM, change the rear end gears from stock (They may be be 3.92 on the DANA 44) You can drop down to 3.23 for the DANA. I did all the above and get 16-17 if at 60mph. I hit 70 all bets are off drops down to about 12-13. and see if you can find a SM-420 trans (4 speed) this helps.

This page is from Jolly's 60-66 GMC site.

http://6066gmcguy.org/ Mail Page

Performance upgrade page

http://6066gmcguy.org/performance.htm

[1960_GMC]

awesome, thank you for your input, when you did this to your truck, how much did the regearing cost? Im working on kind of a tight budget as you could probably imagine haha

[duallyjams]

let see some pics

[jbgroby]

Originally Posted by 1960_GMC

awesome, thank you for your input, when you did this to your truck, how much did the regearing cost? Im working on kind of a tight budget as you could probably imagine haha

I bought the gear set wil all the bearings for abpout $320.00 if I rememebr correct. Ring gear, pinion, shim kit, axle bearings, the whole kit.

http://www.precisiongear.com/dana44.htm

[1960_GMC]

http://sphotos-b.xx.fbcdn.net/hphoto...73003606_n.jpg



http://sphotos-b.xx.fbcdn.net/hphoto...66830731_n.jpg

[1960_GMC]

this is it, im going to keep the rough look and rat rod it (going to clear coat the original patina), add a custom wooden bed, regear the rear end, re do the interior, add a windshield, and redo the exhaust.

[kieth]

If you would like to see how your truck would perform including torque to the ground, and engine rpm PM me your engine, transmission, rear axle ratio, and tire height (ground to top of tire) , include your e mail address and I will send you a performance guide. No charge just good info....Kieth

my e mail is www.tulsatruckcenter@sbcglobal.net

[MusicMan70]

Welcome and awaiting pics as well!

[FetchMeAPepsi]

That's a great looking truck there. I like the clear-coated patina idea on that rusty red too. Make sure to throw up a build thread in the projects/builds forum so we can follow along!

[chevy_man5]

Welcome to the party!!

Definitely need a build thread, and lots of pictures!

[jbgroby]

KOOL, You have the 60-61 hood, DO NOT GET RID OF IT, Worth it's weight in something.

[1960_GMC]

ill be sure to keep you guys posted on the build, and i will definately keep this hood haha, its unique.

And Keith, its a 305 V6 3 speed transmission. I dont really know all of the details exactly, and thats all ive got, but my email is Obi_one64@yahoo.com, and i would love to look at the info you can get me