81 Crew Cab 12V Conversion - Page 2 - Dodge Cummins Diesel Forum
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post #13 of 24 (permalink) Old 09-12-2018, 02:57 PM Thread Starter
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Yes find a 92-93 donor truck for the axles and wiring and heater system everything from Dash Forward will swap over .When it comes to brake system if you choose to run the later system you will have to delete the brake valve on the frame and run the later system .you can use the frame line but you will have to change the fitting on it . It;s a Odd Ball fitting and no way to change it but to cut it off and redo the fitting .the brake line is 3/16 and double flare easy to change out .If you go 47rh your engine will have the right engine plate and starter so you are set there . If you need anything else let us know . these truck's are Easy to build just take your time .
Are there advantages or disadvantages to running the the later or earlier brake systems?


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post #14 of 24 (permalink) Old 09-12-2018, 02:59 PM Thread Starter
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Are there any advantages or disadvantages to running the earlier or later brake systems?

1998 Dodge Ram 2500, 12 Valve Turbo Diesel, 4x4, Quad Cab, Billet built 47RE , 4" straight exhaust, ISSPRO gauges, KDP, 4k GSK, Beehive valve springs, 5x.012, 7mm DV, AFC Live 2, 2.5" HBS leveling kit, 285/75/16 Fierce M/T
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post #15 of 24 (permalink) Old 09-12-2018, 03:23 PM
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The biggest advantage would be if you do a hydro boost brake system. Then if you don't need the vacuum pump for anything you can delete it.

84 K5 Blazer 97 12v, 47re with E-TransControl, Dodge Dana 60 with free spin hubs, Dana 70, B&M Mega shifter

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post #16 of 24 (permalink) Old 09-12-2018, 03:24 PM
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you can run hydroboost brakes off the power steering pump. the difference between that and the vaccuum brakes is staggering.

For intercooler- the stock 1rst gen stuff is the easiest to fit, but also the most difficult to find, and things like the fan hub are outrageously expensive. Like others have said, if you could find a donor, that would make your life the easiest.

One suggestion i will make, hvaing done this swap, is to use a new wiring harness from a place like painless performance, hotrod wiring etc.... these old Dodges didn't have the most long lasting wiring setups, and at this point in their lives have usually been hacked to pieces.

I have a build thread on my old crew cab here if it helps out at all- https://ramchargercentral.com/projec...bt-conversion/

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post #17 of 24 (permalink) Old 09-12-2018, 04:32 PM
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The biggest advantage would be if you do a hydro boost brake system. Then if you don't need the vacuum pump for anything you can delete it.
What about vacuum actuated hvac controls?
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post #18 of 24 (permalink) Old 09-12-2018, 04:38 PM
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What about vacuum actuated hvac controls?
and if you want power steering, you gotta track down a vacuum pump delete, which i think is pretty pricey.

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post #19 of 24 (permalink) Old 09-12-2018, 05:08 PM
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What about vacuum actuated hvac controls?
I'm pretty sure the 81 is all manual controls, they made things simple back then.

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post #20 of 24 (permalink) Old 09-12-2018, 05:10 PM
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and if you want power steering, you gotta track down a vacuum pump delete, which i think is pretty pricey.
The vac delete is easy to track down I got one for my Blazer, and it depends on what you call pricey. Less than $500.00 for a new powersteering pump and the delete plate ready to bolt on.

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post #21 of 24 (permalink) Old 09-12-2018, 05:45 PM
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I'm pretty sure the 81 is all manual controls, they made things simple back then.
Unless he wanted to use the hvac box from the donor truck to get ac, but maybe it could be converted to cable operation anyway.
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post #22 of 24 (permalink) Old 09-12-2018, 11:28 PM
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What's Nice is 1981 to 1993 are all the same heater box and control's the reason I use the 92 era Brake system is it's More up to date and it's Plug n Play hook it up and go .the Heater control's are the same and when you swap everything over just makes it simple .if you are changing interior color and donor is the color you want then all you have to do is change rivet's out for vin number other then that it's Pull windshield and install and Go ,

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RIP Speedy the 67 vw died a very hot Death 5-17-2010 New toy 1985 crewcab longbed 4x4 conversion with a 93 cummin's and built 47rh with compushift mini controlled auto sxe62/70 turbo 6x13 injector's full 4 in Diamond Eye Exhaust ,366 spring and THD fuel pin .along with Boost and Pyro gauges and Tach .
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post #23 of 24 (permalink) Old 03-16-2019, 05:39 AM Thread Starter
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Ok so lets talk transmissions. I have located a fair priced donor truck with an A518 auto. How hard would it be to build that transmission up to withstand up to 500hp, if thats even doable, or would I be better off finding a 47RH to match up to the 94 motor I already have?

1998 Dodge Ram 2500, 12 Valve Turbo Diesel, 4x4, Quad Cab, Billet built 47RE , 4" straight exhaust, ISSPRO gauges, KDP, 4k GSK, Beehive valve springs, 5x.012, 7mm DV, AFC Live 2, 2.5" HBS leveling kit, 285/75/16 Fierce M/T
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post #24 of 24 (permalink) Old 03-16-2019, 08:45 AM
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Get a 47rh or 47re so that you can have LU, then get a good converter.

84 K5 Blazer 97 12v, 47re with E-TransControl, Dodge Dana 60 with free spin hubs, Dana 70, B&M Mega shifter

96 F350 SC dually zf5, 4x4, 92 Cummins, THD 5x12's, THD fuel pin, THD HVLP with adjustable fuel pressure mod, WM, h1c 60/60/12cm WG wired
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