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Author Topic: SM465 clutch question  (Read 3992 times)

Offline Flyinhillbilly

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SM465 clutch question
« on: August 20, 2015, 11:52:42 am »
Hi, I have an 84 K20 with a 350/SM465 and I was wondering if any of you guys knew if it was an 11" or 12" clutch? I'm putting together a new engine combo for it and I'm trying to get as much done as possible before installing it. Thanks in advance for any help.
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I was born on a mountian, raised in a cave,
Overpowered cars is all I crave.

Offline 1967KaiserM715

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Re: SM465 clutch question
« Reply #1 on: August 20, 2015, 12:24:31 pm »
I,'ve seen both 11 and 12, I would go larger for better grip, especially with a new/built engine
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Offline Don5

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Re: SM465 clutch question
« Reply #2 on: August 20, 2015, 02:02:40 pm »
I have always used the Heavy Duty 12 inch 3 finger clutch in my truck. Make sure you replace the pilot bushing too.
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It's been a LONG time since I have been called a newbie. Just sayin....

1979 GMC K15 355, SM 465, 205, 3.73 Dana 44 with a Spartan Locker, 12 bolt Eaton limited slip and 6 inch lift with 36 x 12.50 Super Swamper TSL's.

Offline Flyinhillbilly

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Re: SM465 clutch question
« Reply #3 on: August 20, 2015, 04:02:36 pm »
Thanks guys, I'm putting a turbocharged 6.0 in it, so if they will both fit I think 12" is definitely the ticket.
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I was born on a mountian, raised in a cave,
Overpowered cars is all I crave.

Offline Captkaos

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Re: SM465 clutch question
« Reply #4 on: August 20, 2015, 09:51:19 pm »
The PN for the factory GM bell for a 12" has a specific PN.  What is yours?
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Offline Flyinhillbilly

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Re: SM465 clutch question
« Reply #5 on: August 21, 2015, 11:29:27 am »
Quote from: Captkaos on August 20, 2015, 09:51:19 pm
The PN for the factory GM bell for a 12" has a specific PN.  What is yours?
No idea, it's in the truck and covered in grease. I guess I'll take my creeper to the car wash. Where would the #'s be on the bellhousing?
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I was born on a mountian, raised in a cave,
Overpowered cars is all I crave.

Offline roundhouse

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Re: SM465 clutch question
« Reply #6 on: August 22, 2015, 07:25:50 pm »
With a turbocharged 6.0 you seriously need a slick shifting 5 or 6 speed


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Offline roundhouse

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Re: SM465 clutch question
« Reply #7 on: August 22, 2015, 07:31:46 pm »

Quote from: roundhouse on August 22, 2015, 07:25:50 pm
With a turbocharged 6.0 you seriously need a slick shifting 5 or 6 speed

The NV3500 is great but not sure how it would hold up to that kind of power


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Offline Flyinhillbilly

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Re: SM465 clutch question
« Reply #8 on: August 22, 2015, 07:37:57 pm »
It's just a toy, my daily, but not a race car. The 465 should be my best chance at holding the power. I'm only trying for 500ish rwhp.
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I was born on a mountian, raised in a cave,
Overpowered cars is all I crave.
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