1987 R10 v6 conversion to v8 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pushiniron · 11-23-2010, 01:23 PM

Has anyone converted a 4.3 v6 to a 350? if so what exactly had to be done to the motor mounts?

**Clyde65** · 11-23-2010, 01:32 PM

since your doing that, why not go with an LS motor, youll be glad you did. The lsx will give you better power and more MPG than the 350, all you would need to do is update your intank fuel pump to a Walbro 255 and do some wiring changes. Do you have a 4 or 3 speed tranny?

pushiniron · 11-23-2010, 01:35 PM

i have turbo 350

gchemist · 11-23-2010, 09:19 PM

Motor mounts are the same.

pushiniron · 11-24-2010, 08:59 AM

does the frame brakets have to be moved forward? I do know there's a difference in v8 brackets and v6 brackets.

**Clyde65** · 11-24-2010, 10:45 AM

the 4.3 is nothing but a 350 without the two extra cyl on the front, mounts should be the same along with all acces. mounts also.

I think you could do a 5.3l with under 100k miles for probably under $1k total. it would do much better mileage than a stock 350.

pushiniron · 11-24-2010, 10:59 AM

thanks for the info. Its not stock.

kevinr1970 · 11-24-2010, 04:33 PM

Mounts are the same, "towers" are different.
But should be available in any 73-87 v8 truck.

11-23-2010, 01:23 PM	#1
pushiniron Registered User Join Date: Sep 2010 Location: garner, nc Posts: 13	1987 R10 v6 conversion to v8 Has anyone converted a 4.3 v6 to a 350? if so what exactly had to be done to the motor mounts?

11-23-2010, 01:32 PM	#2
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: 1987 R10 v6 conversion to v8 since your doing that, why not go with an LS motor, youll be glad you did. The lsx will give you better power and more MPG than the 350, all you would need to do is update your intank fuel pump to a Walbro 255 and do some wiring changes. Do you have a 4 or 3 speed tranny? __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

11-23-2010, 01:35 PM	#3
pushiniron Registered User Join Date: Sep 2010 Location: garner, nc Posts: 13	Re: 1987 R10 v6 conversion to v8 i have turbo 350

11-23-2010, 09:19 PM	#4
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: 1987 R10 v6 conversion to v8 Motor mounts are the same. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

11-24-2010, 08:59 AM	#5
pushiniron Registered User Join Date: Sep 2010 Location: garner, nc Posts: 13	Re: 1987 R10 v6 conversion to v8 does the frame brakets have to be moved forward? I do know there's a difference in v8 brackets and v6 brackets.

11-24-2010, 10:45 AM	#6
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: 1987 R10 v6 conversion to v8 the 4.3 is nothing but a 350 without the two extra cyl on the front, mounts should be the same along with all acces. mounts also. I think you could do a 5.3l with under 100k miles for probably under $1k total. it would do much better mileage than a stock 350. __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

11-24-2010, 10:59 AM	#7
pushiniron Registered User Join Date: Sep 2010 Location: garner, nc Posts: 13	Re: 1987 R10 v6 conversion to v8 thanks for the info. Its not stock.

11-24-2010, 04:33 PM	#8
kevinr1970 Senior Member Join Date: Aug 2004 Location: Everett, WA Posts: 2,316	Re: 1987 R10 v6 conversion to v8 Mounts are the same, "towers" are different. But should be available in any 73-87 v8 truck. __________________ 2009 Honda Fit CfC (bsf 44.9 mpg) 2000 Tahoe Limited 1991 GMC CrewCab Dually 2wd, will end up swb, not dually and replace CCswb below 1991 GMC CrewCab Dually 4x4, just going to fix things up for now 1982/1989 K5/GMC Jimmy 2wd 1987 GMC 1/2 ton swb 2wd Crew (sold)

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