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03-25-2011, 12:55 AM
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#1 |
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Registered User
Join Date: May 2010
Location: Roseburg, OR
Posts: 31
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'66 GMC: 250 I6 to 350 V8...?
I want to yank my 250 and swap in a 350. Questions:
As you know this truck has the starter mounted to the bellhousing instead of the block, I will need a V8 bellhousing mount starter right? The six banger one is the wrong tooth count? Clutch linkage attaches to bracket attached with two bolts to side of block(I6). Is there a bracket for the 350 or do I need a different linkage setup? Any other insight or advice? Info? I just want to run my old tranny and stuff, just swap out the engine for now. Thanks guys- John
__________________
If it don't go, chrome it! 
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03-25-2011, 02:23 AM
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#2 |
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Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: '66 GMC: 250 I6 to 350 V8...?
you can use everything on the 250 from the flywheel back on the 350 inc starter. you will need a ball stud for the z-bar(clutch linkage) as the i6 one will not work
ron |
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03-25-2011, 10:20 AM
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#3 |
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Registered User
 
Join Date: Oct 2007
Location: Marietta, GA
Posts: 805
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Re: '66 GMC: 250 I6 to 350 V8...?
As stated above, use your 6-cyl flywheel, clutch, pressure plate, bellhousing, and starter.
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03-25-2011, 12:21 PM
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#4 |
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Registered User
Join Date: May 2010
Location: Roseburg, OR
Posts: 31
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Re: '66 GMC: 250 I6 to 350 V8...?
Wow, I didn't realize that the flywheel was interchangeable. Cool, so thats figured out. Anyone know about the clutch linkage?
Thanks- John
__________________
If it don't go, chrome it!
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03-25-2011, 12:35 PM
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#5 |
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Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: '66 GMC: 250 I6 to 350 V8...?
what did I say above?
ron |
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03-25-2011, 12:40 PM
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#6 |
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Registered User
Join Date: Nov 2009
Location: Orange, CA
Posts: 525
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Re: '66 GMC: 250 I6 to 350 V8...?
1 vote for keeping your inline! V8's are boooring
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03-25-2011, 01:00 PM
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#7 |
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Registered User
Join Date: May 2010
Location: Roseburg, OR
Posts: 31
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Re: '66 GMC: 250 I6 to 350 V8...?
Hahaha seriously I have no idea how I missed that, I must have been tired lol. Sorry about that, I'm usually more "on it" than that lol.
Ok, off to the junkyard to find a ball socket for a V8... I thought briefly about keeping the 250, but I love V8's...sound, power, ect. Thanks again- John
__________________
If it don't go, chrome it!
Last edited by JohnnyBoy350; 03-25-2011 at 01:02 PM. |
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03-25-2011, 01:03 PM
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#8 |
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Registered User
Join Date: Jun 2010
Location: Lafayette , La
Posts: 404
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Re: '66 GMC: 250 I6 to 350 V8...?
if you cant find a ball socket; I bought one from LMC long time ago. You could check there
__________________
1966 Chevy C10 Stepside 355ci sbc with 3speed OD 2021 GMC Sierra 1500 AT4 6.2 1980 Chevy Camaro z28 383ci 1990 Chevy Suburban 350 tbi 2x4 (sold) 1984 Chevy C10 sliverado short fleet 1997 Chevy C1500 short fleet |
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03-25-2011, 01:45 PM
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#9 |
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Registered User
Join Date: May 2010
Location: Roseburg, OR
Posts: 31
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Re: '66 GMC: 250 I6 to 350 V8...?
Ok, I looked in the LMC online catalog and spotted the ball socket. Now my question is; on the 350 does that just screw into the block? No extra bracket like the 6 cyl?
-John
__________________
If it don't go, chrome it!
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03-25-2011, 01:58 PM
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#10 |
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Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: '66 GMC: 250 I6 to 350 V8...?
just threads in
ron |
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03-25-2011, 03:17 PM
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#11 |
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Registered User
Join Date: May 2009
Location: caliente ca.
Posts: 297
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Re: '66 GMC: 250 I6 to 350 V8...?
That depends on yr of block, some older ones don't have the threaded hole for the ball socket. If yours has it ,it is above the oil filter.
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03-25-2011, 05:15 PM
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#12 |
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Registered User
Join Date: Jun 2010
Location: Lafayette , La
Posts: 404
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Re: '66 GMC: 250 I6 to 350 V8...?
I had a 87 and newer small block that did not have the threads. I just drilled and tapped a hole to the same depth and thread pitch as the ball socket. Not hard to do.
__________________
1966 Chevy C10 Stepside 355ci sbc with 3speed OD 2021 GMC Sierra 1500 AT4 6.2 1980 Chevy Camaro z28 383ci 1990 Chevy Suburban 350 tbi 2x4 (sold) 1984 Chevy C10 sliverado short fleet 1997 Chevy C1500 short fleet Last edited by NCD1966; 03-25-2011 at 05:16 PM. |
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