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Old 08-14-2006, 06:54 AM
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Computer System Swap

I am presently in the process of building a driver out of my 49 Chev 1/2 Ton. Took the 5.7 liter and Transmission from an 89 Chev. Have it sitting in the 49 chassis, now have questions of making everything that is electronic work. Was thinking I would use all the wiring harness from the 89, but would like to keep the original dash,
Info and suggestions appreciated.

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Old 08-14-2006, 05:44 PM
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Doc here,

That's kind of a broad spectrum question..

Need to know what it came out of..What is the induction type, will Emissions be required, Is the dash digital or not, Basically need to look at a schematic from the donor car, and decide what functions will be required for the transplant..

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Old 08-15-2006, 12:31 PM
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The '49 dash is 6 volt and uses a speedometer cable rather than an electric signal from the tranny. You might be able to make those original gauges work with the new electronics but it would be a LOT of work and you'd need an adapter to convert the digital signal to a driven cable for the speedometer.

You might be better off getting some original-style gauges that will hook right up to the modern electronics. Check out Dolphin for starters, I'm sure there's other vendors that sell them too.

http://www.dolphingauges.com/quad_gauges.htm

Then you could just run the '89 wiring up to the new gauges and splice in where necessary. You'll need a schematic for the '89 wiring so you know what wires to use.
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Old 08-15-2006, 05:41 PM
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Doc here,

As far as powering up the stock gauges, you can get a 6 Volt instrument regulator..Dodge makes them for like, 70's to I believe 90's Cars and trucks..

If you can't locate one, you , If handy with a Slober iron, and a bit of fabrication, can build a 3 tab regulator from an regulator chip from the local Electronics store, and some heat sink material, plus some shrink tubing..Simple build, 12 volts in to the outer pin, Ground is the center and tab, and 6 volts 1 amp regulated out on the third..mount it on the heat sink material, and shrink tube the pins/wires so they won't short on the heat sink..

As far as the senders..you need to find the resistive value of those, from the stock 49, then purchase those values to fit an SBC threads (or mechanically)

As far as the Transmission, Is it a mechanical unit or does it have a pulse transducer? (electronic) I believe you can make mods to go either way..(depends on what the war chest looks like..)

Need to know a little more about the Donor Car to answer with anymore degree of intelegance..and less "Generic"

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