305 V6 Common? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

johnje · 11-26-2004, 02:22 PM

I called Jegs earlier this week to order an intake manifold to replace my cracked one. To my surprise, the operator said nobody makes a one for my 305 V6! I notice most here have V8 or I6 motors. Are the V6 motors that uncommon for early GMC's?

I'm having the manifold repaired, so no big deal. But I am somewhat concerned about parts availability for stuff I need specific to the V6.

Last night, while eating far too much turkey, my brother-in-law indicated that many parts can be had from any 70's V6 car motor. I'm skeptical.

John

67ChevyRedneck · 11-26-2004, 02:51 PM

That's news to me...far as I've always known a "305" was a smaller pistoned version of the 350. But yes, some GMC's did come with a V-6, not sure of the size, but I think it was a rare option.

CHEVYE · 11-26-2004, 04:14 PM

305 is a very rare option. i don`t think you`ll find much on the aftermarket for one.

CHEVYE · 11-26-2004, 04:17 PM

no car v6 stuff should fit that.

Sweet72 · 11-26-2004, 04:57 PM

That GMC V6 is a whole different animal than the sbc 305. Look at this website.
http://www.6066gmctrucks.org/305V6.htm

Fred T · 11-26-2004, 05:54 PM

Follow Sam's link to Jolly's site, lots of good info there. Heck, you might even find someone that likes that engine!

The GMC V6 was a completely different V6. Nothing at all like any other. Big, heavy, low speed, and would pull anything you could hook on to. It just wouldn't pull very fast. It had a huge crankshaft, huge rods, and it's balance was horrible. The gained a reputation, and about all that could be sold were to fleets. But someone in charge at GMC loved the engine. Whoever he was, I don't know, but he was about the only person that loved it.

I drove a lot of GMC trucks in the late 60's to mid 70's. Most had either the 305, the 351 or the 478. They were okay for in-town delivery. The only GMC I ever liked driving that much had a 427, but by the time I was driving that one she blew a gallon of oil out on a 200 mile trip.

Longhorn Man · 11-26-2004, 08:12 PM

The 305/351 were not rare, but there aren't very many left today. If you see one in the wrecking yard, you need to think about getting stuff off of it, becouse your parts are going to be a PITA to get. Everywhere you go, you will be called a liar, and that there is no such animal, and that it can't be a 305...ect. Tell them to look in the books and not in the computer, and they may find the info, but even then, many places still won't have the info. Your best bet would to be finding a site that deals with the old V-6 engines (the jholly site above maybe) and find out what they do, and where they go.

rodnok1 · 11-26-2004, 08:15 PM

You can get intakes fixed including cast iron

johnje · 11-27-2004, 03:08 AM

Yea, I'm having the manifold fixed now, so no worries on that. I just sort of wondered how easily I should expect to find parts. I'll drive the truck as it is and keep whatever "cool" factor might be associated with having an oddball motor. Too much grief and I'll throw in whatever will most conveniently fit.

11-26-2004, 02:22 PM	#1
johnje Registered User Join Date: Oct 2004 Location: Everett, WA Posts: 17	305 V6 Common? I called Jegs earlier this week to order an intake manifold to replace my cracked one. To my surprise, the operator said nobody makes a one for my 305 V6! I notice most here have V8 or I6 motors. Are the V6 motors that uncommon for early GMC's? I'm having the manifold repaired, so no big deal. But I am somewhat concerned about parts availability for stuff I need specific to the V6. Last night, while eating far too much turkey, my brother-in-law indicated that many parts can be had from any 70's V6 car motor. I'm skeptical. John __________________ '67 M37B1 '67 Galaxie Convertible '67 GMC Truck

11-26-2004, 04:14 PM	#3
CHEVYE my gas saver Join Date: Sep 2003 Location: Clarksville, TN Posts: 2,046	305 is a very rare option. i don`t think you`ll find much on the aftermarket for one. __________________ 85' SWB, 4.3/TH350, getting ready for paint 84`SWB, 462ci./TH400, cowl hood, 15" billet spec., flows, blazer buckets/console, flat black 71`SWB, project ebay feedback

11-26-2004, 04:17 PM	#4
CHEVYE my gas saver Join Date: Sep 2003 Location: Clarksville, TN Posts: 2,046	no car v6 stuff should fit that. __________________ 85' SWB, 4.3/TH350, getting ready for paint 84`SWB, 462ci./TH400, cowl hood, 15" billet spec., flows, blazer buckets/console, flat black 71`SWB, project ebay feedback

11-26-2004, 04:57 PM	#5
Sweet72 Registered User Join Date: Nov 2003 Location: Alexandria, VA Posts: 1,534	That GMC V6 is a whole different animal than the sbc 305. Look at this website. http://www.6066gmctrucks.org/305V6.htm __________________ '72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction.

11-26-2004, 05:54 PM	#6
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Follow Sam's link to Jolly's site, lots of good info there. Heck, you might even find someone that likes that engine! The GMC V6 was a completely different V6. Nothing at all like any other. Big, heavy, low speed, and would pull anything you could hook on to. It just wouldn't pull very fast. It had a huge crankshaft, huge rods, and it's balance was horrible. The gained a reputation, and about all that could be sold were to fleets. But someone in charge at GMC loved the engine. Whoever he was, I don't know, but he was about the only person that loved it. I drove a lot of GMC trucks in the late 60's to mid 70's. Most had either the 305, the 351 or the 478. They were okay for in-town delivery. The only GMC I ever liked driving that much had a 427, but by the time I was driving that one she blew a gallon of oil out on a 200 mile trip. __________________ Fred There is no such thing as too much cam...just not enough engine.

11-26-2004, 02:51 PM	#2
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	That's news to me...far as I've always known a "305" was a smaller pistoned version of the 350. But yes, some GMC's did come with a V-6, not sure of the size, but I think it was a rare option.

11-26-2004, 08:12 PM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	The 305/351 were not rare, but there aren't very many left today. If you see one in the wrecking yard, you need to think about getting stuff off of it, becouse your parts are going to be a PITA to get. Everywhere you go, you will be called a liar, and that there is no such animal, and that it can't be a 305...ect. Tell them to look in the books and not in the computer, and they may find the info, but even then, many places still won't have the info. Your best bet would to be finding a site that deals with the old V-6 engines (the jholly site above maybe) and find out what they do, and where they go.

11-26-2004, 08:15 PM	#8
rodnok1 Registered User Join Date: Jun 2003 Location: Linden, North Carolina Posts: 617	You can get intakes fixed including cast iron __________________ 64 Panel Rebuild Pics Clutch Replacement and Borg Warner T10 Trans Rebuild 64 Panel 1/2 Ton 350cubes/400hp BorgWarner t-10 3:73 Auburn Posi

11-27-2004, 03:08 AM	#9
johnje Registered User Join Date: Oct 2004 Location: Everett, WA Posts: 17	Yea, I'm having the manifold fixed now, so no worries on that. I just sort of wondered how easily I should expect to find parts. I'll drive the truck as it is and keep whatever "cool" factor might be associated with having an oddball motor. Too much grief and I'll throw in whatever will most conveniently fit. __________________ '67 M37B1 '67 Galaxie Convertible '67 GMC Truck



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