Recent content by rose359

  1. rose359

    Tuning vortec to run on as little sensors as possible

    Have you considered carburetion? So many three letter acronyms (TLAs); ECM, PCM, TBI, EFI, MAP, MAF, TPS, IAC, IAT, CTS; which ones have I forgotten? That is good for tuning with a laptop and a code reader; I prefer wrenches. And, I really don't care to have a computer shifting my transmission
  2. rose359

    Red tags on frame?

    Trigger warning or total weight?
  3. rose359

    What transmission is in my 1988 3500?

    I did some more digging for the answer. A person in a Facebook group said that the Getrag transmissions had external hex head fill and drain plugs, while an NV3500 has 17mm internal hex (Allen) plugs. My transmission has the latter.
  4. rose359

    BIZARRE end to the hunting/stumbling idle issue on my ‘95.

    Delphi owns AC Delco, since 1995.
  5. rose359

    What transmission is in my 1988 3500?

    My RPO codes: MM4: Transmission, Manual, 4-Speed (Merchandising Option); M20: Transmission, Manual, 4-Speed (Muncie). The transmission in the truck is a 5-speed; first gear does not feel nor sound like granny gear. My reference is the SM420 in my last truck (1966 C10) - first gear was a crawler...
  6. rose359

    Carrying Spare Tire for my 3500

    Here are my drawings; the assembly drawing shows the hardware. I used two existing holes in my bed rail. If I was drilling, I would put the 1/2" bolt between the two 5/16" mounting bolts. I mounted the metal to the rail and then marked the location of for the 1/2" bolt through the wheel lug...
  7. rose359

    Carrying Spare Tire for my 3500

    The first photo shows the level of overkill used to clamp the rail.
  8. rose359

    Carrying Spare Tire for my 3500

    I built and installed it; the spare tire is secured.
  9. rose359

    Carrying Spare Tire for my 3500

    I have some aluminum that I can use like this, with a 1/2-20 stud in a tapped hole. I found a spare tire stud lock on eBay for $17. I can get a Grade 8 bolt (1/2") for about $5. The gray part of the assembly in the drawing is the box rail. There are two existing 5/16” holes 1-1/2” apart on...
  10. rose359

    Carrying Spare Tire for my 3500

    I am just started to think about it; it is a low priority. I am presently setting up a manual carb choke control. I thought I was going electric choke, but the primary throttle shaft is 1/4" too long, and Holley wants about $200 for a replacement primary throttle body.
  11. rose359

    Carrying Spare Tire for my 3500

    It is a GMT400
  12. rose359

    Carrying Spare Tire for my 3500

    Thanks; the truck is an 1988 Scottsdale 3500 (454 with Holley 750 - 5 Speed. The hardware was not lost due to corrosion; this truck is clean underneath.
  13. rose359

    Carrying Spare Tire for my 3500

    I just purchased a reconditioned wheel and a used tire for a spare. My truck came from the previous owner less a spare tire, jack, lug wrench, and tire carrier. It appears to have room for a tire under the box, but nothing is present to hang it. I am OK carrying the tire in the box, but will...
  14. rose359

    Delco AM/FM Radio

    Yes, above the accelerator pedal is the unit shown in the picture. I don’t see the connections, though there are some unused connections in the side of this unit.
  15. rose359

    Delco AM/FM Radio

    Digging some more today, I pulled out the radio from the dash and learned that it was not connected. I show the connector next to the radio in the photo. I pulled out the tangle of wires, connectors, and fuse holders, disconnecting the black, blue, and yellow connectors shown. I thought perhaps...
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