disc upgrade question

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Jul 9, 2012 | 10:12 AM

pimpimusmaximus

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Joined: Aug 2010

Posts: 230

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From: San Antonio

Car: 1984 Z28 T-TOP

Engine: 355 Lt1 w/Hotcam

Transmission: TH700R4

Axle/Gears: 3.73 4th gen limited slip

disc upgrade question

I am upgrading my '84 open drum rear end with a '95 posi disc rear end from a Z28. I think that the lines will match up. My question is do I swap my distribution block to an all disc block or do I just use a proportion valve for the rear lines to adjust the pressure. And what dist block to use ('84 4 wheel disc or '95 4 wheel disc?

Jul 12, 2012 | 06:30 AM

JamesC

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Joined: Aug 1999

Posts: 19,282

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From: Lawrence, KS

Car: Met. Silver 85 IROC/Sold

Engine: 350 HO Deluxe (350ci/330hp)

Transmission: T-5 (Non-WC)

Axle/Gears: Limited Slip 3.23's

Re: disc upgrade question

Quote:

Originally Posted by pimpimusmaximus

I am upgrading my '84 open drum rear end with a '95 posi disc rear end from a Z28. My question is do I swap my distribution block to an all disc block or do I just use a proportion valve for the rear lines to adjust the pressure. And what dist block to use ('84 4 wheel disc or '95 4 wheel disc?

You can use an adjustable valve for the rears. The first-design 1LE valve would also work, providing that your 84 has metric threads. My guess is that you have the old-style cast iron valve, which has SAE threads, vs the newer alum-style which has metric threads.

JamesC