I have an 83 Firebird (originally a V6) with an 85mph speedo. I wanted to know if there was a way to swap to a 140mph speedo. I know the newer cars (85-up) have different plastic trim around the gauges, but I wasn't sure if they are interchangable. I would like to keep my original trim piece if possible. The gauges are all in one cluster, right? Or could I just change the speedo and leave the rest?

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1983 Firebird T-top- 383/TH350, South Side Machine SFC's & lift bars, 91 Formula bumpers, Harwood cowl hood, 89 T/A rear wing, 17" Centerlines, 89 Formula interior... Estimated completion date: never

 

The 140MPH cluster will swap into your car with no problems. I have one for sale if you are interested and I'm less than an hour away from you.

 

the 140 MPH speedo's that came with the 350TPI cars are electronically controlled where your 83 has a cable driven speedo.

So no it is not a direct bolt in replacement.
But to answer another part of your question yes the cluster with all the gauges does come out in one piece but you can open it up and take and swap out the speedo.


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84 FIREBIRD-(undergoing rebuild)2.8 V6,5spd,T-Top
90 Formula Modded 350 TPI T-Top
WANTED:82-84 Firebird 2.5 4cyl,4spd-Just Cause

Previous 3rd gen's
83 Trans-Am 305 CFI auto T-TOP
84 Firebird 305 H.O. auto HARDTOP
87 Firebird 2.8 V-6 auto HARDTOP

 

Yes, it is a direct swap. They are all cable driven in Camaro's up to 89. For the Firebirds, 86 or 87 and up is electronic, along with Berlinettas.

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1989 IROC-Z 5.7L
NOS 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System

[This message has been edited by Omar (edited May 03, 2001).]

 

I have one electronic cluster and one cable driven cluster.