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Hello:
I want to put a 6.0 engine and a 4L80E from a 2003 van. I have a few concerns: fitment, wire harness, rear end strength. The car is a 6 cylinder. I am planning on upgrading to all disc brakes, automatic shift on the floor, and EFI. I don't want to spend tens of thousands on parts. I already have the drive train. I might be able to get the whole donor vehicle. Can someone help me regarding getting a new complete wire harness, what things I might be able to use from the donor. My cousin is a body man and will paint it for free. Thank you for any help!!!!
 

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Welcome to Team Chevelle.....:waving:

If you scroll down to the LSx forum on this site, you should find answers to your questions.
 

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You will spend thousands on parts but not tens of thousands. You will need motor mount adaptors, maybe an oil pan, if you cannot trim your old harness an aftermarket one runs about $500 - $600. Get one with a fuse and relay panel. The optimum ECM to use is the 0411, the van may or may not have that. New radiator, accessory drive system as most times the truck set up is not compatible with a car frame.
 

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I am doing this swap, but with a stick shift in my 67. I am using the holley swap mounts and oil pan, and the truck accessories fit fine with the forward bias brackets they sell. (this allows the truck a/c compressor to fit)...

You can have the van harness modified and the ecm that came with it reflashed to delete VATS for a reasonable price, if keeping the engine stock...
 

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I am doing this swap, but with a stick shift in my 67. I am using the holley swap mounts and oil pan, and the truck accessories fit fine with the forward bias brackets they sell. (this allows the truck a/c compressor to fit)...

You can have the van harness modified and the ecm that came with it reflashed to delete VATS for a reasonable price, if keeping the engine stock...
Keeping the stock harness and reworking it, is it STILL POSSIBLE to place the ECM inside the car under the dash? So for that reason a NEW harness with extension wires might be better???
 

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i spent months writing a blog for 67 ,, read it
 

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I used Dirty Dingo brand adjustable mounts and smaller dia. power steering pulley, Mast (Holley) oil pan, hooker exhaust manifolds, shift works shifter to fit the factory console, vaporworx tank from Rick's tanks, an off-brand radiator with fans, ECU and longer harness from PSI Conversions.
Tons of info on LStech forums too.
 

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I am doing this swap, but with a stick shift in my 67. I am using the holley swap mounts and oil pan, and the truck accessories fit fine with the forward bias brackets they sell. (this allows the truck a/c compressor to fit)...

You can have the van harness modified and the ecm that came with it reflashed to delete VATS for a reasonable price, if keeping the engine stock...
have the same mounts but have not installed my engine yet,did your factory power steering pulley for the truck also clear the steering box with these mounts?
 

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You need a Dorman 300-201- worked perfect on my 6.0
 

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1964 Chevrolet Chevelle Malibu 4 door
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You need a Dorman 300-201- worked perfect on my 6.0
If you plan on flogging your engine to it's potential, watch this plastic pulley. Seen a couple of people have these shatter when they're up around 6k rpm.
 

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If you plan on flogging your engine to it's potential, watch this plastic pulley. Seen a couple of people have these shatter when they're up around 6k rpm.
Yea, yea - anything can happen to every piece on a car if you beat the hell out of it. If it breaks I'll post back with my fix. I figured I'd roll the dice on a $20.00 part than spend $2,000 on a billet drive system.
 
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