Chevelle clutch linkage question

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bill k
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Chevelle clutch linkage question

Post by bill k » Mon Aug 08, 2016 7:25 pm

My 1967 El Camino currently has an automatic transmission.
Shortly I will be converting to a Muncie 4 speed transmission.
I will also be installing a SBC 406 engine. The problem I have is with
the engine block itself. The drivers side of the small block, above the filter, generally has
(2) threaded 1/2" x 13 tapped holes for the clutch "Z" bar. This block has
the bosses but no threaded holes. My question is, which location on the block
needs the hole to mount the pivot ball, the front location or the rear location?
I will probably drill and thread both locations anyway, but still need to know
so the pedal geometry will work correctly when installed.
As usual, thank you for your accurate responses.
Bill

Kenova
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Re: Chevelle clutch linkage question

Post by Kenova » Mon Aug 08, 2016 10:08 pm

bill k wrote:......... My question is, which location on the block
needs the hole to mount the pivot ball, the front location or the rear location?

Bill
The correct position will depend on where the other end of the Z-bar is mounted to your frame.
The 400 in my Nova has both holes drilled and tapped. Needless to say, with a 50/50 chance of picking the right one I failed the first try.LOL
Drill and tap both of them. I'm sure it will save you some aggravation.

Ken
Over the hill but still learning!
Retaining it is the hard part.

pdq67
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Re: Chevelle clutch linkage question

Post by pdq67 » Sat Aug 20, 2016 9:23 am

DZAUTO goes through this stuff extensively if you want to hunt up what he has posted on the car sites in the past. I want to say over on both TC's, but it may just be on Team Chevelle?

And fwiw, there are bell-housings out there that have either a third pivot hole or a hole that can be threaded for such use. I want to say for big truck hydraulic clutch use as well as for some of the big Chevy cars through the years, but check me here.

pdq67

chevy art
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Re: Chevelle clutch linkage question

Post by chevy art » Wed Aug 31, 2016 10:13 pm

billy a person your age should be driving an automatic. stick shift has too many levers and pedals to confuse an old timer like you. art

jimjamm65
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Re: Chevelle clutch linkage question

Post by jimjamm65 » Sat Sep 03, 2016 12:03 pm

according to my 1967 chassis service manual. the cross shaft ball goes in the hole nearest the rear of the block. most 400 blocks are not drilled in either position. if it was me, I would drill and tap both bosses, but the book plainly shows the ball in the hole just forward of the rear edge of the block.

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