Author Topic: Clutch & Flywheel setup  (Read 3743 times)

Offline Da67goatman

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Clutch & Flywheel setup
« on: March 31, 2026, 09:12:48 am »
Background:  TBI 350 converted back to carb with HEI distributor along with np833 4 speed transmission from behind a 250ci straight six all going into a 62 c10. I'm in need of some assistance in picking the correct parts to mate the two. 

I have the factory bellhousing with fork but would like to run a hydraulic master/slave setup for packaging.  It has been so long, I have forgotten about the multiple balancing and rear main options that the SBC has and have never dealt with a clutch that wasn't just a kit for that specific vehicle.  I know some of you die hard manual guys have all this stuff figured out so if you could recommend parts, I would be most grateful.
<Pitcrew>
1989 R2500 Suburban mild 350 TBI 700r4 10.5" 14bolt 4.10 w/ 33s
1992 fullsize Blazer 4x4  35s no lift, 4.10s, Hella driving lights, TJ Flares, Huge bumpers, Snorkel, custom interior

Offline VileZambonie

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Re: Clutch & Flywheel setup
« Reply #1 on: April 07, 2026, 06:46:22 pm »
Look up parts using an 87 R10 350 for MY6 application.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Da67goatman

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Re: Clutch & Flywheel setup
« Reply #2 on: April 08, 2026, 03:42:10 pm »
Will that clutch require changing to a hydraulic throwout bearing?  Or can I use an external that pushes the factory clutch fork and throwout bearing?  The old style pressure plate only has 3 fingers vs the many of the newer style.
<Pitcrew>
1989 R2500 Suburban mild 350 TBI 700r4 10.5" 14bolt 4.10 w/ 33s
1992 fullsize Blazer 4x4  35s no lift, 4.10s, Hella driving lights, TJ Flares, Huge bumpers, Snorkel, custom interior

Offline VileZambonie

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Re: Clutch & Flywheel setup
« Reply #3 on: April 12, 2026, 04:44:50 pm »
So I just swapped the clutch in my 75 Jimmy from the ole 3 finger to a Bellville spring type and boy is it easier and smoother. Are you familiar with the hydraulic clutch master and slave used on these trucks? They are external, not internal.
,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Da67goatman

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Re: Clutch & Flywheel setup
« Reply #4 on: April 12, 2026, 06:15:06 pm »
That factory external slave style is what I would like to use. I wasn't sure if the 87 r10 you referenced has a hydraulic throwout bearing or an external slave. Thanks a bunch for helping me get this sorted.  Is there a specific brand that seems to be better quality or brands that are trash quality?  I was leaning toward a LUK or exedy clutch kit, but I have no experience with either.  Same with a flywheel, any brands to stay away from?
<Pitcrew>
1989 R2500 Suburban mild 350 TBI 700r4 10.5" 14bolt 4.10 w/ 33s
1992 fullsize Blazer 4x4  35s no lift, 4.10s, Hella driving lights, TJ Flares, Huge bumpers, Snorkel, custom interior