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07-18-2012, 11:29 PM
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#1 |
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Registered User
Join Date: May 2010
Location: durham maine
Posts: 31
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converting 85 chevy to a 5.3
85 Chevy 350 with th350 wanna keep the trans in it have whole 2002 gmc for motor harness what do I need for swap from truck and what do I need to modify first time doin swap here's a few pics of truck
Posted via Mobile Device |
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07-18-2012, 11:32 PM
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#2 |
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Registered User
Join Date: Nov 2011
Location: yucca valley,ca
Posts: 206
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Re: converting 85 chevy to a 5.3
Motor mounts and buy a flexplate or find one from a 4.8,5.3,6.0 with a 4l80e price of cake swap I got one on a 81 shorty
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07-18-2012, 11:58 PM
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#3 |
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Registered User
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
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Re: converting 85 chevy to a 5.3
If the engine is drive by wire you need to mount the gas pedal from the new truck or change it over to a throttle cable.If it was me spending that kinda time and money i would use a over drive trans so i get the best gas mileage i can.
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07-19-2012, 07:52 AM
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#4 |
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Registered User
Join Date: Oct 2011
Location: Emory TX
Posts: 900
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Re: converting 85 chevy to a 5.3
I used the factory under hood fuse block on my swap. You will only have 3 wires to hookup to make it run.
__________________
___________________ 78 ccsb dually 5.3 4l60e http://67-72chevytrucks.com/vboard/s...d.php?t=491551 |
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07-19-2012, 08:48 PM
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#5 |
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Registered User
Join Date: Jul 2012
Location: mustang, ok
Posts: 35
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Re: converting 85 chevy to a 5.3
I did the swap and used the 4l60e. I have 20's on the back and still get 17mpg. I love it. Stays below 200 degrees running temp to.
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07-19-2012, 09:46 PM
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#6 |
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Registered User
Join Date: Apr 2003
Location: Cold Springs NV
Posts: 85
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Re: converting 85 chevy to a 5.3
those of you that have done this swap including the trans, what did you do for the speedo cable? because isn't the older engine & trans using the cable while the newer one is electronic? I have been considering this swap and using the more up to date 6 speed auto in my 87 short bed with 305 & 700R4.
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07-19-2012, 10:29 PM
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#7 |
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Registered User
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
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Re: converting 85 chevy to a 5.3
They sell a converter box i can't think of its name but it has a motor in it to spin the speedo cable so it works.Or the 91 crewcab used a 4l80e wonder if the gauges could be swapped over?
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07-19-2012, 11:47 PM
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#8 |
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Registered User
Join Date: Jul 2012
Location: mustang, ok
Posts: 35
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Re: converting 85 chevy to a 5.3
I used the gauges out of a 91 surburban cause the Speedo is electric. It works perfect up to 70 then it gets off by 5 mph.
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07-20-2012, 12:21 PM
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#9 | |
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Registered User
Join Date: Apr 2003
Location: Cold Springs NV
Posts: 85
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Re: converting 85 chevy to a 5.3
Quote:
Do you know who sales the converter? Also has anyone ever done the swap to a 6 speed auto instead of the 4 speed? If so is there any concerns with trans mounts or other issues? Thanks |
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07-20-2012, 12:27 PM
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#10 |
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Slots go on anything!
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
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Re: converting 85 chevy to a 5.3
PM Shon on the board and get a price from him for a Cable-X. That's what you are looking for.
__________________
1974 Jimmy- 5.3/4L80e/NP241 |
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07-20-2012, 12:40 PM
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#11 |
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Registered User
Join Date: Dec 2008
Location: Tempe, Az
Posts: 325
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Re: converting 85 chevy to a 5.3
http://www.atrol.com/cablex.htm
$279 or $329 plus shipping is what I believe they told me. Posted via Mobile Device
__________________
74 C10 LWB 350/T5 Dropped on 20's Soon to be Bagged and Injected 84 C35 Crew Cab Dually. 454/400 Dropped a lot. Instagram: mmmdropp |
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07-20-2012, 12:43 PM
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#12 |
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Registered User
Join Date: Dec 2008
Location: Tempe, Az
Posts: 325
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Re: converting 85 chevy to a 5.3
Edit: Double post... My bad
__________________
74 C10 LWB 350/T5 Dropped on 20's Soon to be Bagged and Injected 84 C35 Crew Cab Dually. 454/400 Dropped a lot. Instagram: mmmdropp |
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