sm465 linkage help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CharlieBrown · 01-25-2019, 03:17 PM

1972 Blazer 454 with sm465 and headers.....what are you doing for clutch linkage?

**mongocanfly** · 01-25-2019, 03:21 PM

Are you talking about everything?....or just a specific part.....

CharlieBrown · 01-25-2019, 05:16 PM

all of it....factory z bar will not clear headers...has anyone gone to a hydraulic setup?

**Captainfab** · 01-26-2019, 12:13 AM

Converting to a hydraulic clutch is certainly a easy way to solve the issue with a big block conversion.

http://www.67-72chevytrucks.com/vboa...d.php?t=652871

**mongocanfly** · 01-26-2019, 12:32 AM

yeah I agree...hyd is the easiest way

**kwmech** · 01-26-2019, 01:54 AM

Quote:

Originally Posted by CharlieBrown

1972 Blazer 454 with sm465 and headers.....what are you doing for clutch linkage?

Pull the engine forward to the 2wd position and use the 2wd linkage. Only way I know to make it work correctly.

CharlieBrown · 01-26-2019, 10:08 AM

Best forum period.

Mike C · 01-28-2019, 09:44 PM

There is no pulling the engine forward because the 4x4 uses a different crossmember.

Either get rid of the headers and get a set of Heddmans which will clear the factory linkage or get a set of 2 1/2" manifolds.

I had some Doug Thorley chrome tr-y's I want to run years ago but had some issue. Bought a cheap set of headers and they didn't work. Ran the Heddmans and OEM linkage for 12 years or so. Then I went to the 'vette manifolds and that is what I would recommend anyone else do as well.

**kwmech** · 01-29-2019, 01:38 AM

Um, yes you can pull the engine forward. Unbolt it and move it forward, redrill. And yes there may be a clearance issue with the oil pan on the 454 that may need to be addressed. Just moved an engine forward on a customers 72 to put a T400 in and a doubler. My customer retained the 350, so I just used a 2wd fan shroud. Just recently helped my son-in-law install a 454 in his 68 3/4 ton. We converted to 4x and 454. Used the 2wd bolt holes and I had a set of big block stands. He bent a piece of 3/8'' flat plate steel to connect the lower part of the stands as a x-member

Mike C · 01-30-2019, 09:20 AM

I can’t believe I read that first thread and didn’t see it was a 454.

I know you can do all of that to move the motor forward, but usually a question such as that precludes the poster from such work because they asked a simple question.

Obviously my mistake as the big block swap doesn’t allow for an easy bolt in swap. Mea culpa.

dave`12 · 02-26-2019, 09:36 PM

Without photos, I don't know on your big block, but when I put a small block in my truck, I cut off the bottom lever of the z-bar and welded it back a couple of inches over to clear the headers. But careful not to go to far or it will pop off when you press it in.

Just an idea.

3K144J · 03-02-2019, 01:36 AM

CharlieBrown,

I have a SBC 400 CI with a SM420, I did what Dave12 also had done, I put on set of long tube headers and had to move the lower clutch rod over to the end of the Z Bar, I also shortened and threaded the lower rod and used a rod end for the connection... it works real nice!

Joe

3K144J · 03-02-2019, 01:40 AM

One more pic....

**mongocanfly** · 03-02-2019, 02:55 AM

that looks awful close right there ...is that a before or after?

Shaky · 03-09-2019, 07:05 AM

These guys might know about hydraulic options since they do a lot of SM465 swaps.

https://www.novak-adapt.com

01-25-2019, 03:17 PM	#1
CharlieBrown Registered User Join Date: Dec 2007 Location: Van Buren Arkansas Posts: 137	sm465 linkage help 1972 Blazer 454 with sm465 and headers.....what are you doing for clutch linkage? __________________ 1972 Cheyenne Super..owned since 1978 1972 Surburban 4x4 1972 Cheyenne 4x4 3/4 ton.....sold 1972 Cheyenne 2wd...named Death Row

01-25-2019, 03:21 PM	#2
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,592	Re: sm465 linkage help Are you talking about everything?....or just a specific part..... __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

01-25-2019, 05:16 PM	#3
CharlieBrown Registered User Join Date: Dec 2007 Location: Van Buren Arkansas Posts: 137	Re: sm465 linkage help all of it....factory z bar will not clear headers...has anyone gone to a hydraulic setup? __________________ 1972 Cheyenne Super..owned since 1978 1972 Surburban 4x4 1972 Cheyenne 4x4 3/4 ton.....sold 1972 Cheyenne 2wd...named Death Row

01-26-2019, 12:13 AM	#4
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: sm465 linkage help Converting to a hydraulic clutch is certainly a easy way to solve the issue with a big block conversion. http://www.67-72chevytrucks.com/vboa...d.php?t=652871 __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

01-26-2019, 12:32 AM	#5
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,592	Re: sm465 linkage help yeah I agree...hyd is the easiest way __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

01-26-2019, 10:08 AM	#7
CharlieBrown Registered User Join Date: Dec 2007 Location: Van Buren Arkansas Posts: 137	Re: sm465 linkage help Best forum period. __________________ 1972 Cheyenne Super..owned since 1978 1972 Surburban 4x4 1972 Cheyenne 4x4 3/4 ton.....sold 1972 Cheyenne 2wd...named Death Row

01-28-2019, 09:44 PM	#8
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,714	Re: sm465 linkage help There is no pulling the engine forward because the 4x4 uses a different crossmember. Either get rid of the headers and get a set of Heddmans which will clear the factory linkage or get a set of 2 1/2" manifolds. I had some Doug Thorley chrome tr-y's I want to run years ago but had some issue. Bought a cheap set of headers and they didn't work. Ran the Heddmans and OEM linkage for 12 years or so. Then I went to the 'vette manifolds and that is what I would recommend anyone else do as well. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

01-29-2019, 01:38 AM	#9
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,396	Re: sm465 linkage help Um, yes you can pull the engine forward. Unbolt it and move it forward, redrill. And yes there may be a clearance issue with the oil pan on the 454 that may need to be addressed. Just moved an engine forward on a customers 72 to put a T400 in and a doubler. My customer retained the 350, so I just used a 2wd fan shroud. Just recently helped my son-in-law install a 454 in his 68 3/4 ton. We converted to 4x and 454. Used the 2wd bolt holes and I had a set of big block stands. He bent a piece of 3/8'' flat plate steel to connect the lower part of the stands as a x-member

01-30-2019, 09:20 AM	#10
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,714	Re: sm465 linkage help I can’t believe I read that first thread and didn’t see it was a 454. I know you can do all of that to move the motor forward, but usually a question such as that precludes the poster from such work because they asked a simple question. Obviously my mistake as the big block swap doesn’t allow for an easy bolt in swap. Mea culpa. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

02-26-2019, 09:36 PM	#11
dave`12 Registered User Join Date: Sep 2015 Location: Lake Placid florida Posts: 599	Re: sm465 linkage help Without photos, I don't know on your big block, but when I put a small block in my truck, I cut off the bottom lever of the z-bar and welded it back a couple of inches over to clear the headers. But careful not to go to far or it will pop off when you press it in. Just an idea. __________________ 1967 C-10 4-speed, 350v8

03-02-2019, 01:36 AM	#12
3K144J Registered User Join Date: Jun 2018 Location: Meridian, Idaho Posts: 14	Re: sm465 linkage help CharlieBrown, I have a SBC 400 CI with a SM420, I did what Dave12 also had done, I put on set of long tube headers and had to move the lower clutch rod over to the end of the Z Bar, I also shortened and threaded the lower rod and used a rod end for the connection... it works real nice! Joe Attached Images

03-02-2019, 01:40 AM	#13
3K144J Registered User Join Date: Jun 2018 Location: Meridian, Idaho Posts: 14	Re: sm465 linkage help One more pic.... Attached Images

03-02-2019, 02:55 AM	#14
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,592	Re: sm465 linkage help that looks awful close right there ...is that a before or after? Attached Images __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

03-09-2019, 07:05 AM	#15
Shaky Six in a row makes it go... Join Date: Mar 2009 Location: Vacationland: Maine Posts: 1,346	Re: sm465 linkage help These guys might know about hydraulic options since they do a lot of SM465 swaps. https://www.novak-adapt.com __________________ 67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce



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