[rfmaster]

Originally Posted by mcbassin

Hi guys this is a great thread thanks Glock for starting it and all the others that have added to it. My son and I are diving into this swap out well kinda. The plan is to remove the motor and tranny in tact and plug it into the 86.Thread here: http://67-72chevytrucks.com/vboard/s...d.php?t=356697 So far we have unhooked just about all the wiring and mechanical on the donor. I will be junking the car when done so I can keep the complete wiring harness if necessary.

I noticed pretty much everyone on here is using a 87-90 truck or aftermarket tbi harness. I picked up a 92 buick 5.7 with a 700r4 (i think) for $300 on craigslist to put into my Son's 86 swb. It runs and shifts good...we drove it home with the AC on. Anyway, this is a super low buck build just to get him a driveable truck and then sell later to invest in his 69 (we are probably gonna do a 5.3 conversion on it). Or if we stay hooked up on it he may just drive them both who knows?

So here is my list of questions for now:
1. Can we use the car harness and ecm ?
2. What parts will we need to buy?
3. What is the K.S. talked about on this thread?
4. I have never even touched a tbi engine until yesterday
Can we do this project? I haven't worked on trucks since the 90s.

The 92 B-Body with 5.7L with 700R4 will make a perfect donor for a '86 (that's what I did for my conversion). Do you know that 90' B bodies were around 5000 lbs!!!. Save full harness. Car ECM 16136965 belongs (different pgm mask) to the C3 ECM family and is similar to 1228746/1227747 ECMs. There are five additional control lines (I/O) that '6965 uses that are not found in truck 7747 ECM. They are:

A3 Dark Green/Yellow 428 Canister Purge Solenoid
C1 Black/Pink 429 Air Divert Solenoid
C2 Dark Green/White 459 AC Compensation Relay Control
C8 Light Blue/Orange 495 Power Steering Pressure Switch
C12 Tan 472 MAT (or IAT) Signal

out of the five I/O MAT (C12) you must keep or otherwise ECM will set error code. IAT improves AE and PE over wide range of temperatures.

Use car harness as is - no need to buy anything.

KS part number is a bit tricky - use the same as on donor engine. Make sure to keep ESC module that was used on B- Body - it is mounted on AC relay bracket - passenger side fender. I'll have to look up this part, but OE part number should be good for your conversion.

Swap is straight forward. It is not to difficult just take your time and plan ahead. If you have questions - drop a a line.

I took a look at your donor photos - I hope that you re-sealed your donor engine (oil leaks can ruin clean compartment).

//RF