​Wiring harness is done.

Once i lay it out on the motor for good, i will put all those push-in fasteners back on the loom so it stays in place.
Also as you may have noticed, the hood is off. Thats cuz the front-clip is off too:

​Doubler removed

​351/C6 coming out

​Ok, ive got this wiring thing figured out.


Heres how it goes. Trying to repin both the engine harness & the main control harness, just so i can then splice it into my chassis harness, is a waste of time. Ive got a simpler, wayyyyyy better solution: grafting the 351w harness onto the 460. I know it sounds crazy, but it will totally work, and its actually not that hard to do. It is not a bolt-in swap, so to speak, as there is some wiring that must be done.

So here we go. First up, remove the engine harness. Of note is the 89 fuel rail, and how the fuel lines connect to it right behind where the a/c compressor would be

​Here is my junkyard rail swapped in place, with the fuel lines connecting in the back like the 351 does

And here is where i began exploring the electrical. It seems both engines use pretty much the same sensors. The TPS is different; on the small blocks the sensor has a pigtail, on the 460 the wiring harness plugs right into it. So that connector must be changed.
Aside from that, the only other difference is the distributor.

88 351w

​89 460

​Im not really sure why the difference, but after looking at the wiring, i see it just intersects the PIP & the Signal Return, on their way to the TFI. The third is in parallel w/ the TFI. So unless somebody tells me not to, tomorrow im going to splice that plug into the 88's harness. It will be easy enough to do.

Ok, so the 88's harness has a 'secondary' harness. It goes to all 8 injectors, the ECT, TPS & the IAC. The wires are also all way too long, which means i can shorten them all up, and have a nice neat engine harness:

Before i cut anything. You can see how much extra wire i have to work with:​

​This is where im at right now. That secondary harness is done, ill get a pic of it tomorrow. The 'main' harness runs from the EEC connector up the firewall and to the back of the motor where it plugs into the secondary harness. But it also goes to the TFI/Distributor, TAD, TAB, EVR, EGR, A/C, the oil pressure sender, that other stupid little sensor (i forget what it is), the MAP sensor, and a few grounds. At this point i have this entire harness de-loomed. I have completely removed the TAD, TAB, EVR, EGR & A/C circuits. I have added an EGR Eliminator up at the EEC connector to take care of the EGR. I am also re-routing several of the wires, because i think the 88 harness looks like crap with wires run haphazardly across the motor. Ive got about 8 hours into all this today, but all thats left now is to modify the TFI/Dist connections, organize a few wires and then re-loom everything. So if it doesnt snow, and i get to work on the truck tomorrow, then i should have no problem finishing the wiring harness.

​Popped the valve covers off.  Its pretty clean under there!

Covers cleaned up & primed

​Ok, i was at the junkyard all day today, scored some sweet stuff

Up top, new intake hoses because that gray plastic piece in mine is busted.
New oil cooler since i didnt get mine with the motor.
All the wires/connectors i need to update my chassis harness.
Different fuel rails for the 460.
The plastic panels for the sides of the 40/20 bench in my F250.

All for $30!

Tomorrow im going to start working on the wiring harness. I need to pin out the 88 & the 90 harnesses to figure out which wire goes where, and then i can splice the connectors in.

As for the fuel rails, i found this interesting. My 88 351, has both fuel lines connect to the rail at the back of the motor. My 89 460 has the fuel lines connect at the front of the motor, meaning i would have needed new fuel lines. Well, i found this rail in a ~96ish truck, and it has the fuel lines connect at the back of the motor just like my 351, so i should be able to just connect my stock lines to it and be done!

​Yeah, looks like its happening. Been looking on/off for a 351 for my dad's truck since he needs a motor, and ended up finding a 460/C6 combo (w/ harness & ECM), so i bought that instead. Plan is to drop the 460/C6 in my truck, then put my 351 in his truck, and i guess sell my small block C6.

Mess of stuff in the bed of my truck

Stainless headers, w/stainless ARP bolts holding them in place.

​Ive never seen headers like this before, the d.side wraps down under the engine behind the pan. Its designed to bolt up the factory dual-inlet cat.

​Extra crap i dont need (egr, alt, smog pump, all other emissions crap)

​I got a set of towers out of a junkyard so i can run stock motor mounts.

​Also got a saginaw off a 460 van, thought i had a pic of that but i guess not. Ill get one when i put it on the motor.


So heres the plan. the motor ran strong when the truck was cut up so im not going to do anything to it other than change a couple seals, and clean up the valve covers & pan. Swap my 3G on, add a Saginaw, and eliminate the emissions.
Heres the fun part. My truck is an 88, and the engine is an 89. Unfortunately, 88 has a bastard harness, the 89-91 harness is different. So i have a lot of wiring to do. The engine harness is in good shape, the main control harness (the harness that connects the motor to the ECM, and connects to the lights/ starter relay etc) was butchered when the motor/tranms was pulled. Now, i saved the control harness from my p/u cab since it wasnt compatible with my truck (cab is a 90), so it looks like ill be using that harness instead of my 88. But this means i must change all the connectors that go from the control harness to the chassis harness. This is the easiest way to make it all work i think. So tomorrow im going to the junkyard to either find a 88 460 to steal the engine harness off of (what are the odds of that?), or im chopping up a junkyard 89-91 harness to get the connectors i need to retrofit mine.