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  1. Sean McDonough

    Big Red: 1991 K1500HD

    Specs as of 9/23/2018: Engine: very mild 350 SBC with long tube headers, carb swapped and stock chevelle camshaft Transmission: TH700R4 with burnt out OD Gears: 3 42s :banghead: Chassis: F44 package heavy duty suspension Axle: 9.5in semi float w/g80 Tires: 31.5" Milestar Patagonia All Terrains...
  2. Sean McDonough

    454 bolt in ?

    I got a great deal on a 289 454 block. I've seen a bunch of post over trans will obviously not hold up, computer won't swap blah blah blah. Haven't really found much on if it will fit k1500 size wise and motor mount wise. Trans will be a built 700r4 from monster with 14 bolt ff so not too...
  3. Sean McDonough

    Tire fitment

    Hey guys ! I was looking at upgrading my trucks tires to something more aggressive than the off brand ATs that came with it. I've been looking around and have decided on super swamper tsl sx tires. I want to run a 35" tire, but I want to run the 15.5" wide tire because the wider the tire the...
  4. Sean McDonough

    Transfer case stuck in 4wd

    So I changed the fuse on my 4wd and was able was able to get it to go into 4wd finally. Unfortunately it wouldn't come out so we tried putting in 4hi then to 2hi. Going back and forth between neutral and drive. And the 4wd light would stay on and the front driveshaft was still turning. We even...
  5. Sean McDonough

    Skid plate question

    This may not be the right place for this but I didn't know where else it should go. I just had a question about mounting the front differential skid plate from a z71 truck onto a non z71 1991 k1500. I was given the skid plate by itself no bolts to speak of yet. Does anyone have pictures of how...
  6. Sean McDonough

    Transmission Problems

    Finally got my truck all good to go and went for a drive in it. Was taking a left turn and hit the gas a bit since a car was speeding faster than I thought and then all of a sudden I lost 3rd gear. Now I just had the trans rebuilt, and get said that he installed high energy 3 and 4 clutch packs...
  7. Sean McDonough

    Np241 Harness Plugs

    Hey everyone I got my entire powertrain back into my truck and went to go replug all of the loose plugs under the truck that go to the transfer case. As far as I can tell on my 91 k1500 there are 3, one plugs in the rear by the driveshaft and 2 others. One is a Male type plug the other is...
  8. Sean McDonough

    TBI to Carb wiring question

    Ok so i know this has been about a ton of these posts, but i can't find anything directly related to what I need to find out. So the engine harness in my truck unfortunatley was gutted before I bought it. So instead of having a computer controlled tbi in the truck again, I'm going to carb it. I...
  9. Sean McDonough

    Transmission Removal

    I've seen a few post about removing the transmission but none answered any of my questions as far as i could see. I'm trying to drop out my trans from a 91 k1500, and it's very rusty ( thanks ohio ). Right now my big issues is removing the rear drive shaft, what size bolts are on it where it...
  10. Sean McDonough

    Strength of IFS ?

    I learned a few days ago my new truck doesn't have a solid front axle, friend thought the front diff and axle shafts meant it was a solid axle :(. So I was wondering just how strong is the IFS ? Can it handle some more heavy mudding or should I limit it to the more moderate trails ? I'm mostly...
  11. Sean McDonough

    New Guy From Columbus, OH

    Hey everyone ! I've already made some other posts because I needed answers before I went to the junkyard today, but glad to be here ! I'm a soon to be high school graduate from Grove City, Ohio just outside of Columbus. I just bought my friend's dad's old k1500, but already own a 2003 GMC Envoy...
  12. Sean McDonough

    Cut Up Engine Wire

    Hello, I'm a bit new here. I have been looking on here for a post about my specific problem but haven't found anything. My friend was going to get rid of his 1991 k1500. The thing is awesome with a k2500 suspension, sas and 14bolt rear end. They were going to scrap it because the transmission...
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