Converting 86 k10 to an 04 silverado

[dothedew]

Will be sending the wiring harness and computer out in the middle of july to have it chopped up and computer reflashed. Its also a drive by wire system, so I'll be gaining cruise control as a side benefit.

These guys will be doing my wiring work. Prices are reasonable and have seen multiple good reviews.
http://www.lsx-harness.com/

[A2theR84]

wow, that is a good deal on the harness. on the manifolds i noticed the newer ones without EGR clear the frame rails, but the flange on the passenger side needs one ear cut off

[dothedew]

Yes, they do offer a good service. For 325, your wiring needs are taken care of, computer reflashed, and everything is plug and play, ready to go. Looking foward to it.

Truck does not have EGR luckily, since its drive by wire. Good to know the manifolds will fit. May have some issues with the hydraulic clutch slave cylinder and line, but I should be able to work something out I hope. I'll be clearancing the frame to fit the passenger side manifold then to allow proper fitment.

[A2theR84]

you dont need to cut the frame if you cut one of the exhaust flanges off, and tap a different hole to mount your own stud to thats what i did

[dothedew]

Question for fuel pump

Since I already have a tbi tank and fuel sending unit, is swapping in a high pressure pump as simple as removing tbi pump, then attaching a short peice of rubber hose from the new pump to the old sending unit inside the tank? Haven't really looked how the tbi pumps are fashioned to be honest;assuming they are mounted via rubber hose to the hard portion of the sender. How are they attached to the sender (from factory)? Special clamps, or will hose clamps work fine?

Since I'll be running probably some high pressure rubber line, how long (lifespan) can I expect the rubber line to last? Assuming that its not chaffing or exposed to sunlight? I really don't want to pull the box to swap in new lines every 2 years. Any other solutions other than rubber?
I do have the factory fuel line from the silverado. Hope to use some/if not all of it and mounting inside my frame rails. Main reason is to keep the factory fuel connector at the end which connected to the intake manifold/fuel rail. Hoping the other end will fit the factory end of the vette filter regulator.

Did I mention I hate plumbing?

[dothedew]

Tank Selector Unit

I know that there is a high and low pressure unit availible for these older trucks. For upgrading to intank pumps, I understand the high pressure TSU must be used.

I am however considering using an inline Walbro 255 pump mounted on the frame rail, connected directly to a vette filter/regulator. I like the idea of having the pump accessible in case of failure without having to drop a tank, and from what I read, the new inlines are almost as quite as the in tanks.

Now in doing so, the return line would be plumbed back through the TSU. Would there be any pressure whatsoever in the return line that might effect a low pressure tank selector unit? I figure there may be some, since the supply line is 3/8ths, and return is only 5/16ths. But since there is no resistance in the tank, perhaps there would be no pressure buildup in the return. I dunno, thoughts?

[dothedew]

Have now got the destined 5.3 up and running. Click for video.



Runs well. Selling of remaining parts from wreck to help pay for new flywheel, pump and motor mounts. More documentation will take place when the conversion begins. I have done a lot of careful measuring. I was hoping to use the factory y-pipe, however I believe it would be extremely tight fit, if it even fit at all. Will be running factory manifolds coupled to a custom exhaust.

Still unsure of the fuel pump. Will be using the corvette regulator, however I'm not convinced where I should put the fuel pump, intake tank, or inline? I like inline, since if it failed, it would be easy to change. However intake pumps hardly fail, and I have two tanks, therefore two pumps, and it would be much quieter. Opinions?