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'89 R3500 Crew Cab 2wd to 4wd conversion & beyond

Started out with 2wd TBI350 with SM465 to current 4wd with 454, 700r4, NP241
Overview Gallery Discussion
Tired of thinking about this and pulled the trigger this morning

sniperefi_w_handheld_polish.jpg


Paid $935 thanks to a buddy's discount.

And also bought this from Summit

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It's only 1000# but its a HELL of a lot more stout than my HF stand. Figured it was worth the investment if I'm going to be doing any motor work with my son
 
Biggest was that I could get the $60 discount. I also read reviews from people that switched from FiTech to Holley and they mentioned some points I liked. The Holley comes with more linkage options for tranmission cable. They also commented that the touchscreen on the Holley is better. The last thing I knew about already, the Holley will control 2 fans.
 
The biggest thing I didn't like was the appearance of the Holley. I do think the FiTech is neater looking but I decided I shouldn't make the decision based on appearances.
 
You should come on a trail run with us and see first hand.....
 
Here's what I have to do:
  1. Replace both fuel pumps
  2. Replace fuel tank selector valve
  3. Replace braided steel fuel lines that run from frame to throttle body
  4. Undecided about replacing small bit of factory installed rubber line between tank selector valve and the hard lines
    1. That bit of rubber is crimped to the hard line so it would require cutting it off the hard line. I don't know if this hose is rated for pressure higher than 20psi.
  5. Remove TBI wiring harness and ECM
  6. Will need to use the HEI that came with the 454
    1. Down the line I will put in a distributor that can connect to the Holley for timing control. The instructions recommend getting the system running properly before adding the timing control.
There's certainly no real advantage to the truck already having TBI except that I have the baffle tray in my tanks.

It helps knowing that I've recently replaced the pumps so I put in new fuel injection hose that will stand up to the higher pressure needed for the Holley. But also related to that, I have to replace both pumps with the higher pressure units; I'm using a pump that would have come in a 97 Tahoe.

I'm also replacing the tank selector valve with a unit that can handle the higher pressure. One good thing about this I learned from past experience, it will make dropping the passenger tank easier with the valve out of the way.

And on that note, I was going to have to drop the passenger tank regardless because that pump was not working properly. So in reality that part of the deal is a wash for me.

It would be easier installing the Holley or FiTech coming from a carbureted system if a person wanted to use the Fuel Command Center. A TBI system puts out too much pressure for the Fuel Command Center, it can only deal with 8psi input pressure.
 
There's the AC Delco U70001 or Pollak 42-159. The Pollak is typically listed as part of a kit, 42-302 I believe.

I'm basing all my information on searches I did for running a 5.3L/6.0L fuel system with dual tank setup. There's no documentation on the pressure ratings for the U7001 but the concensus seems to be that all those that have owned both think the Pollak & AC Delco unit are the same.

The paperwork for the 42-159 lists 65psi as the maximum pressure. I'd prefer the Pollak since I have verifiable data on it, but it's not as easy to find as the AC Delco valve.
 
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