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#126 | |
Registered User
Join Date: Feb 2013
Location: Boulder City NV
Posts: 214
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Re: 1966 GMC 305 V6 Service
Quote:
The Holley PDF says to connect it to ported. I tried both but I made so many changes at once that I haven't figured it out yet. |
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#127 |
Zero Albedo
Join Date: Mar 2009
Location: San Gabriel, California
Posts: 478
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Re: 1966 GMC 305 V6 Service
Gorgeous write up!
Makes me want to drag my 64 out of the back 40 and see what the racket was all about and maybe try to do something about it.
__________________
Baz "Deserve's got nothin' to do with it." 66 GMC 1500 wideside longbed 250 4spd "Project Rekker"http://67-72chevytrucks.com/vboard/s...d.php?t=467467 65 GMC 1Ton Panelhttp://67-72chevytrucks.com/vboard/s...32#post4794432 65 Chevy Panel (former U.S.Navy truck) 64 Chevy Suburban Carryall 4x4http://67-72chevytrucks.com/vboard/s...d.php?t=358348 64 GMC 1000 wideside longbed 305 4spdhttp://67-72chevytrucks.com/vboard/s....php?p=3600890(Rip- parts truck now) 68 Dodge Charger |
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#128 |
Registered User
Join Date: Apr 2013
Location: Knoxville TN
Posts: 1,170
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Re: 1966 GMC 305 V6 Service
Thanks for the compliments.
I took the GMC 305E on an I-75 trip 3-4-14 and got 13.4 mpg and 14.1 mpg driving approx 70mph. Need to get her out more but I've been tied up. |
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#129 |
Registered User
Join Date: Jun 2005
Location: Anchorage, Alaska
Posts: 10
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Re: 1966 GMC 305 V6 Service
wow what tranny do you have? my 69 feels like its revving up to 5000 rpm when I hit 60MPH. I'm pretty sure they al came with the 4 speed granny low tranny, except the automatic version.
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#130 |
Registered User
Join Date: Aug 2013
Location: Greencastle, PA
Posts: 14
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Re: 1966 GMC 305 V6 Service
Great thread with tons of information and detailed pics. I myself am rebuilding one of these and was wondering did you use as far as the rear main seal? I order felpro set from summit, seal bs40048 and its just a rope seal, curious if you were able to find a two piece rubber or you settled with the rope seal? Thanks alot
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#131 |
Registered User
![]() Join Date: Jun 2006
Location: Maple Valley, WA
Posts: 1,913
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Re: 1966 GMC 305 V6 Service
I know this is an old thread but now that you seem to be a master rebuilder of these engines have you thought about adding some performance upgrades to them? From the look of the heads they could handle much larger valves and do they really need 4 rings on the pistons? Knife edging the crank to make it lighter and blueprint the rods too. Not in the sense to make it rev higher but to increase performance at its regular rpm range. Has anyone stuck the massive 472 with its 5" bores in one of our trucks yet?
My 65 had the 305E behind the Powergilde, was there an adapter plate needed to mount the glide to the 305E? I know where one is...can it be used to bolt other autos to it?
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Custom Painter/Restoration Specialist 1965 GMC 3/4 Ton LB SOLD? 1964 Chevy El Camino in full restoration 1991 Chevy S10 288K+ miles 2nd Owner SOLD 2020 RAM 1500 Warlock |
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#132 | |
Post Whore
![]() Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
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Re: 1966 GMC 305 V6 Service
Quote:
https://www.youtube.com/watch?v=mdZlZlWRRMI
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1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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#133 |
BLAZER THIRTY!!
![]() Join Date: May 2007
Location: Utah
Posts: 324
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Re: 1966 GMC 305 V6 Service
question for you, did this kit work great? no modifications of the disc? I'm looking for a clutch for my 62 with the 305 I found for sale on ebay nu551 and wanted to verify before purchasing thanks
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49 chevy 5 window 20 year project (sold)😟 57 ford fairlane (dad's car never got to it before he passed away R.I.P I LOVE YOU DAD.) 62 GMC 305 V6 custom L/B 72 HIGHLANDER K5 BLAZER 2nd owner ![]() ![]() ![]() 71 K5 MAMMA'S RIDE! 63 GMC 4X4 305 V6 62 GMC SHORT BED SERVICE BODY V6 (STUMPY) 74 GMC CUSTOM 1500 L/B |
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#134 |
Registered User
Join Date: Feb 2007
Location: west coast
Posts: 3,371
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Re: 1966 GMC 305 V6 Service
Old post yes, but, there are plenty of V6 owners out there that might find this old post and this article I found recently interesting. Mileage reported by Rufton is almost indentical to the owner of the GMC in this 1967 letter to the editor. The "cold" plug and the "hotter" plug confusion may be the culprit of some V6 owners reporting lower gas mileage than they should be getting.
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