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305 V6 to 350 swap do I need anything special?

13046 Views 8 Replies 5 Participants Last post by AJMBLAZER, Feb 22, 2011

Discussion Starter · Jan 26, 2004

Taking out my old 305 V6-still runs-just lacking the torque for my dump truck. I got a nicely built 350 engine swapping in this weekend. Manual SM465 tranny. Will I need different engine mounts? And how about the flywheel/pressure plate/clutch assembly. I don't mind picking up some new stuff-but if the old clutch parts will work-it would be nice.

I will also have the running v6 available if someone is interested-its in the Virginia Beach area.

Any help on the swap is appreciated.

Thanks
~TIM~

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gottagofast

· #2 · Jan 26, 2004

You talking about a bigblock v-6 like in the old 2 ton trucks? or a 305 v-8 or a 4.3 v-6 or a straight 6?

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wrath

· #3 · Jan 26, 2004

He's talking about the old GMC 305 V6. It's an oddball motor from the days when GMC had their own. I think the last of them were put in the 68 model year.

I don't know much about them.

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Discussion Starter · #4 · Jan 26, 2004

Its a V6 305-mainly used in late 60's GMC trucks-but appeared in some heavier trucks in the early 70's-like my dump truck.....

Anyone have info on the swap?

~TIM~

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dave

· #5 · Jan 27, 2004

Check out this link, http://www.6066gmctrucks.org/305V6.htm

To the best of my knowledge, everything is different on the GMC 305 V6. The motor mounts, the bellhousing bolt pattern, the flywheel, and maybe even the clutch / pressure plate bolt pattern.

dave

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gottagofast

· #6 · Jan 28, 2004

dayyum ..... I never knew the general made a v-12 gas engine ....... I WANT one but at 1400 lbs might be kinda heavy for the s-10

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gottagofast

· #7 · Jan 28, 2004

Ya know, it's prob a good thing yer so far away ....... I'd prob be trying to buy the v-6 from ya ... for some crazy reason I've always wanted to bump one up 10:1 do a little porting fab a 4 barrel intake and headers and cram it in a pickup.

really don't know why just a wild hair kinda thing.

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mpw92

· #8 · Feb 9, 2011

I need a 305 V6

I just bought a 1967 GMC C25 pickup this past weekend in Indiana. The truck's original engine was a 305 V6, unfortunately the engine was scapped and now has a 250 inline 6 from sometime in the late 70's I would like to bring the truck as close to original as I can and I am looking for a GM 305 V6 truck engine. Please let me know if you want to sell yours or know of someone else that has one they are willing to part with.
Thanks, Mark

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AJMBLAZER

· #9 · Feb 22, 2011

FYI there's one on the Lexington, KY Craigslist.

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