will it bolt up
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will it bolt up
i have a 92 f150 4.9 with 5 speed the motor is very tired and has blowby i have a donor truck which is a 85 f150 with a 5.0 and bad auto will the 5.0 bolt up to the trans in the 95 and what all would i need to get from the donor is the underhood wiring the same or would i have to swap that thanks in advance poorman
Lead Driver
Joined: Nov 2002
Posts: 9,555
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From: Concord, NC
You will need under-hood wiring for a 5.0, but the 85 wiring is so much different that it won't work very easily. You should find a 5.0 harness from a same or similar year truck that the engine is going into.
Posting Guru
Joined: Jan 2003
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From: Munroe falls, Ohio
flywheels are different, 4.9l is neutral balanced while the 5.0l is a 28oz or 50oz imbalance depending on year.
the '85 should just be a carb or electric carb setup.
theres 3 years listed, what are you trying to do?
the '85 should just be a carb or electric carb setup.
theres 3 years listed, what are you trying to do?
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
Yes, they will. Since the 85 is EFI it makes it a lot easier. Take the computer and the whole wiring harness.
If you're doing a 4x4 conversion at the same time, remember that you need a new tranny to bolt the t-case up to.
It would be a whole lot less work just to buy a 4x4 truck with a working engine.
If you're doing a 4x4 conversion at the same time, remember that you need a new tranny to bolt the t-case up to.
It would be a whole lot less work just to buy a 4x4 truck with a working engine.
Lead Driver
Joined: Nov 2002
Posts: 9,555
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From: Concord, NC
The wiring harness is still quite different on a 92 as compared to an 85. The computer will be fine, but it will take a lot of work to integrate the 85 harness into the 92 truck.
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Post Fiend
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Lead Driver
Joined: Nov 2002
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From: Concord, NC
I haven't seen an 85 wiring harness, but I'll assume it's pretty similar to my 87, which has basically a stand-alone engine harness from computer to engine that has one plug to interface with the chassis wiring for things like EEC power feeds, oil pressure, water temp, and tach signals, etc. The 92 wiring is more integrated with the entire underhood wiring harness (computer through chassis harness to smaller engine harness), used a main relay box instead of the two relays hanging off of the air filter, plus what is needed to make the PSOM work, just a couple off the top of my head. It's certainly not impossible, but it's not going to be a simple plug and play operation, that's all I was getting at.