71-72 ss instrument cluster on a 70 harness - Chevelle Tech
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post #1 of 11 (permalink) Old Aug 15th, 14, 1:14 PM Thread Starter
Dean
 
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71-72 ss instrument cluster on a 70 harness

So i'm in the finishing stages of my 70 and am looking to go with the original ss style gauges. After looking online at multiple reproduction kits it seems the only difference in the 70 and the 71-2 SS gauges is the color. i like the looks of the 71-2 better personally and want to know if it will be a direct plug up with my 70 dash harness or will i have to do some tweaking? Any advice would be great as the people at ecklers, Opgi, and ground up weren't sure.
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post #2 of 11 (permalink) Old Aug 15th, 14, 1:28 PM
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Re: 71-72 ss instrument cluster on a 70 harness

I think it is different. I am not 100% sure but I know the fwd harness is completely different. The horn relay is on the firewall on a 72 and to use a 70-71 harness up there you have to swap a couple of wires at the plug.

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post #3 of 11 (permalink) Old Aug 16th, 14, 9:06 AM
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Re: 71-72 ss instrument cluster on a 70 harness

The cluster and the printed circuit board are the same for 70-72.

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post #4 of 11 (permalink) Old Aug 16th, 14, 12:24 PM
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Re: 71-72 ss instrument cluster on a 70 harness

71-72 Dash may contain a seat belt warning light lower right. On a 70 harness it would not be a plug and play, but that doesn't mean it can't be done. The 70 dash would not have that indicator.

Just curious Dean, what is it about the 71-72 dash that you like over the 70? Is it just the color of the gauge characters?

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1970- NOM, 496, M21, #48 Forest Green.
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post #5 of 11 (permalink) Old Aug 16th, 14, 7:52 PM
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Re: 71-72 ss instrument cluster on a 70 harness

Quote:
Originally Posted by Dm70Chevy View Post
So i'm in the finishing stages of my 70 and am looking to go with the original ss style gauges. After looking online at multiple reproduction kits it seems the only difference in the 70 and the 71-2 SS gauges is the color. i like the looks of the 71-2 better personally and want to know if it will be a direct plug up with my 70 dash harness or will i have to do some tweaking? Any advice would be great as the people at ecklers, Opgi, and ground up weren't sure.
If your car is already set-up with factory wiring for gauges, there is no issue simply changing out the green colored gauges with the white (71-72 gauges).

If your car is NOT set-up for gauges at all (Sweep dash), major wiring needed. If the car has "SS style dummy lights", then you can "re-pin" the dash wiring if you are patient, but will need to have a new forward lighting harness installed for the ammeter circuitry.

The seat belt warning light is no issue. This uses separate connections that can simply be abandoned. Now, using a '72 dash harness is an issue as the bulkhead pin-outs are different from the corresponding connections a '70.

I think you need to let us know EXACTLY what you have and what EXACTLY you want to do so we can guide you better.

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post #6 of 11 (permalink) Old Aug 17th, 14, 8:28 AM Thread Starter
Dean
 
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Re: 71-72 ss instrument cluster on a 70 harness

Thanks for the responses. I already have a 70 ss gauge harness but the gauges came with the car when i bought it are pretty busted up and some don't work. it would look better IMO to just replace the whole cluster with a full kit.

As for what i don't like about the 70 its just the color and wasn't sure if that was the only difference. the seat belt light and horn problem sound like easy fixes. I figured they wouldn't have made any huge changes considering the clusters look almost identical. didn't want to order the parts, and find out they are totally different somehow. Also, would I be doing my 70 wrong by taking away its green gauges? lol
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post #7 of 11 (permalink) Old Aug 17th, 14, 9:46 AM
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Re: 71-72 ss instrument cluster on a 70 harness

Quote:
also, would i be doing my 70 wrong by taking away its green gauges?
yes!

If you donít push the limits how are you going to find the weak spots?
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My car: 1970 Chevelle

Factory 12 bolt /4-Speed Malibu -Dual stage wet nitrous with heater & purge - Holley Strip Dominator, Speed Demon 750 CFM - (All MSD distributor, blaster 3 coil, 6AL, & 3 stage retard) - 4 wheel disk brakes - Aeromotive Fuel system Ė Boss 338 18ís - BMW 5.25 true HID projector mod - and of course... the FLAPPER - bla, bla, bla.. lots of other expensive stuff I canít remember
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post #8 of 11 (permalink) Old Aug 17th, 14, 7:10 PM
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Re: 71-72 ss instrument cluster on a 70 harness

This is just my opinion Dean, but it's your car. I would stick with the 70 gauges for your car. When or if you ever do sell your car the 72 gauges will be an automatic attention getter for anyone who knows their A-bodies. It's not the end of the world but it's kinda like looking at a Monte dash in a Chevelle, I start looking hard at everything else.
Besides, looks like your doing a great job on that shadow-grey 70', give it what it deserves. Plus no wire issues, your money ahead.

1970-LS5, #28- Fathom Blue,TH400, original motor car.
1970- NOM, 496, M21, #48 Forest Green.
1972- Malibu, 350. TH350- original motor car, #43 Gulf Green.
1970 Chevelle 517 cid, TH400, best ET mid 9's. #19.
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post #9 of 11 (permalink) Old Aug 17th, 14, 8:02 PM
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Joe
 
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Re: 71-72 ss instrument cluster on a 70 harness

It's your car do what makes you happy. I've always liked the green/green instrumentation over the blue/white. The '71/'72 gauges will pop right in.

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post #10 of 11 (permalink) Old Aug 17th, 14, 8:14 PM
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Re: 71-72 ss instrument cluster on a 70 harness

Thumper is right.. I have a 72 Monty dash and I never claim it to be anything itís not (still have the 70 green cluster though)Ö nothing about my car is factory and I donít care.. Itís MY car and it started life with me as a ratted out Malibu.

If you are not worried about resale and this is your ďforever carĒ do what you want. If you are thinking about flipping it anything soon, you might stick with green especially if itís a documented SS.

https://www.youtube.com/watch?v=ce7jp1r9eNE

If you donít push the limits how are you going to find the weak spots?
USMC- Retired
My car: 1970 Chevelle

Factory 12 bolt /4-Speed Malibu -Dual stage wet nitrous with heater & purge - Holley Strip Dominator, Speed Demon 750 CFM - (All MSD distributor, blaster 3 coil, 6AL, & 3 stage retard) - 4 wheel disk brakes - Aeromotive Fuel system Ė Boss 338 18ís - BMW 5.25 true HID projector mod - and of course... the FLAPPER - bla, bla, bla.. lots of other expensive stuff I canít remember
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post #11 of 11 (permalink) Old Aug 17th, 14, 9:19 PM Thread Starter
Dean
 
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Re: 71-72 ss instrument cluster on a 70 harness

Haha yeah thanks for the advice, just seeing if it were as easy as it seemed. I just thought all the aftermarket stuff out there (and Ive looked at probably every kit on the web) throws off the old school feel of the car and was just seeing what options I had to keep it looking stock. Anyways thanks guys
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