Keeping factory instrument cluster
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Supreme Member
Joined: Oct 2006
Posts: 1,974
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Car: 91 RS
Engine: 350 vortec
Transmission: T-5
Axle/Gears: not the best not the worst
Keeping factory instrument cluster
Right now i have a 91 305tbi Rs i am looking to switch to a carb in preperation for a 350 of some design still to be determined.... and i am looking to keep the original instrument cluster and run it through the ecm... is it possible could i just put in a new coil and distr. and just disconnect the old ones...?
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The instruments aren't run through the ECM. So, with a distributor with vacuum and mechanical advance, you're good to go.
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From: SW Florida
Car: 86 iroc z black/gold
Engine: LB9
Transmission: T5
Axle/Gears: 3.42 posi disk
what about the speedometer? isnt 90-92 electronic controlled through the computer? If you took the ECM out, wouldnt the speedo stop working?
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Joined: Sep 2002
Posts: 9,192
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From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Nope - speedo will be fine as well. Might have to change speedo gears if you end up with a different geared rear differential, but the speedo will work.
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