Holley has one that is made for their ProJection setup that just happens to work excellent on the 84/5s...The 84/5 TPS's rotate the opposite direction of the 86/7's...Some will tell you that it is okay to use the 86/7's but why not get the right type...The only difference with the Holley TPS is the plug points towards the front of the car when installed instead of straight up like the factory GM TPS...I've got it on my car and it works great!!! This came from the gnttype archives...If you call Summit to order it, just tell them you have the Holley part # and they can get it, otherwise they might not even find it if they have to look for it...
Here's a post that I posted a while back about it...
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greg kring: 84 TPS replacement
Date: Mon, 19 Oct 1998 23:11:35 -0500
From: greg kring <mailto:summit01@nationwide.net>
Subject: 84 TPS replacement
One of the list members here asked me about the part number for the
holley TPS I used to replace the bad factory original one on an old 84GN
I had. Since I spent the time to dig through the receipts I figured I
might as well post it here that way it will be in the archives for
anyone else who is interested. I bought it through Summit as a
replacement part for the Holley Projection System. The part number is
HLY-543-29. It's listed as a TPS KIT and cost me 27.39 at the time. It
works exactly as original and has been on the car four years now.
Personally I think it's better than original as the plug now faces
straight towards the front of the car rather than up towards the hood as
original. I don't know if the original tps is hard to find or expensive
like some of the parts specific to the 84 turbo cars (coil packs, turbo
up pipe, etc.), but if it is here's an alternative.
greg kring
87 GN
Arlington, Texas
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