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  1. krcaddis

    Fire extinguisher vs. engine

    My timing was so far off that my 85 C20 backfired big enough to split my LH muffler from end to end, catching my filler neck and hose on fire. Fortunately we were able to get it out with a fire extinguisher - the dry powder kind. I had a fresh full tank. Once I got the repairs done I used the...
  2. krcaddis

    85 C20 AT suddenly backfires; now runs crappy

    My recently re-powered crate 350 (TH400) suddenly backfired cruising about 40 MPH and now sort of lugs, less power and sputters on decel. I suspect the timing. I changed harmonic balancers to match the rest of the pulleys, located the TDC (different place than marked), set timing based on that...
  3. krcaddis

    new crate motor, now no A/C and just one fan speed

    '85 C20 350/400, A/C- Thought I saw a similar post but didn't find it. I just plugged in a multi wire plug to a relay on my firewall and now I have a only low fan speed (in all run modes), but no A/C . At least it's some progress over nothing at all. A/C worked great before the swap after a...
  4. krcaddis

    WTB 700R4 to replace '85 C20 longbed TH350 2WD

    I'm looking for a good usable 700R4 '88-92 to replace my good running TH350 in my 85 C20 long bed 2WD. Easiest exchange is '88-92. 9" tailshaft and whatever else is generally required. I don't know all what else is needed I hope- cable, etc. I have a fresh Holley 4 BBL on it, so I want to keep...
  5. krcaddis

    Backfiring help

    Yesterday my '85 C-20 Scottsdale blew the muffler open along the seam on deceleration after a series of lesser pops. It's very first few miles on my 1st gen Mexican crate 350 transplant - driving to town to smog it. Then the plastic shield on the tank caught fire, then the cap. Fortunately a...
  6. krcaddis

    Electrical problem after crate motor install

    All is good after the crate motor installation in my '85, EXCEPT for two wiring snafus. 1) my fuel gauge (dual tanks) is pegged at 3:00. Somewhere under the hood there's an incorrect or missed connection. It's not even supposed to go further than about 1:00. 2) my heater fan and AC controls...
  7. krcaddis

    Manually rotating SBC without plugs

    I'm ready to find TDC on my crate 350 and install a timing marker. I pulled all the plugs squirted a bit of Marvel Mystery Oil in to lube the cylinders. (Heads are on it). I had to swap harmonic balancers to get the crank pulleys to align with the accessories (Alt. Smog Pump, Water Pump, PS...
  8. krcaddis

    '91 2500 with 700R4 probs

    I had (previous truck) a nice high end, but salvage title, a '91 4x4 2500 extended cab for about 4 years that had repeated problems- I know it’d had a tranny fluid fire, but the seller was a great body man and painter, did those for a living, and his Dad owned a tranny shop. All damage was...
  9. krcaddis

    350 crate HP vs. '85 350 L Series

    I'm just installing a low mileage crate engine to replace my grossly overheated original 350 /turbo 350 trans '85 2WD C-20 Scottsdale. The specs on the factory (14010207) is 165 HP @3800 rpm, 275 FT LB @1800 rpm The crate as spec'd (1066036) is 249 HP @ 4300 rpm and 275 FT LB @ 3600 rpm They...
  10. krcaddis

    New to the list, need to sell my 85 C-20 2x4

    I'd like to post an ad as it's time to let my C-20 go. 41.3k miles. It's been a great truck but needs head gaskets. How do I get permission to post? It's fresh on Craigslist 8/1/17 in San Luis Obispo CA. This will likely be deleted, but I can't find rules, imitations, etc on the site. WIl...

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