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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
mrk5 said:
I'm trying to budget out what I need to set up the TBI on the 454. My current 350TBI does not have the knock sensor circuit which I do want to add. I have a computer and harness from a TBI350 that did use a knock sensor. So I just need to have a chip made for it correct? What does that entail?

While I'm at it, I would prefer to delete the EGR part of the setup. I assume this is possible when I have the chip made for the ECM?
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Yes, easy enough to remove the EGR from the tuning. As yours already has the VSS, keep that in the system.

Two recommendations for you:
Call Troy at Howell and ask what other considerations need be allocated into what you are doing.
Consider the throttle spacer
 
Mine has the mechanical VSS but I was thinking about getting the electrical version. I would like the improved flexibility for the speedometer since I have the DIY4x dash. It's not near accurate for various reasons but I still have the VSS hooked up behind the dash. I use a GPS speedo app on my phone. I just pulled the back part of the speedo off and zip-tied it back behind everything.
 
mrk5 said:
Mine has the mechanical VSS but I was thinking about getting the electrical version. I would like the improved flexibility for the speedometer since I have the DIY4x dash. It's not near accurate for various reasons but I still have the VSS hooked up behind the dash. I use a GPS speedo app on my phone. I just pulled the back part of the speedo off and zip-tied it back behind everything.
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That's virgin territory for me...
 
Talked with Howell this afternoon. Really all I need is a chip. My TBI should have the knock sensor; I think the 3/4 and 1 ton 350 TBI didn't, but only the 454 went without - until 90. The sensor is there, but not connected to anything. I'll have to see if I can find the lead stuffed up somewhere.

He did tell me their harnesses are going to work well in my situation where I already have TBI. Their harness is made for older vehicles that don't already have the bulkhead penetrations and what not.

So I think I'm going to try and scrounge up a donor harness or just see about fixing up the one in the truck now. Big thing is finding that knock sensor lead.

And I try not to post without pictures so......

2017-01-18%2015.24.30.jpg
 
I miss my old 454....I had built it but had to sell it before I could run it. 30 over, comp can 292 magnum cam, torker intake....sigh....

The motor came out of a 76 caprice station wagon, it had a whopping .260 lobe lift. I port matched the (round) intake ports & manifold. I would have loved to dyno'd that.
 
mrk5 said:
I know this is stock peanut port 454, but I'm still super excited to get it running in the truck. It will be the largest displacement motor I've driven.
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Massive change from the squito killa
 
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