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  1. luna negra

    thoughts on low vacuum?

    Just swapped in a new to me 350 in my K5. Never heard it run before today but was told it had a bigger cam in it from seller who I trust. He had no idea of the cam specs. Getting around 12 Hg at idle but the motor sounds happy with the timing set at 12 initial and 36 total. Vacuum gauge is...
  2. luna negra

    no electrical power

    Finally buttoned up an engine and tranny swap in my '79 K5. Went to start it and it turned over fine, then quit working after about 30 seconds of total crank time. Now, I have no power anywhere - starter, lights, accessories. Thought it might be battery or cables but it has 12.7 Volts and...
  3. luna negra

    TH 350 bellhouse cracked and welded

    Finally got around to doing a 350 SBC swap on my '79 K5. Front oil pump seal is also leaking on the TH 350 and found that the bell house has been previously welded. I was going to take a stab at replacing the seal and bushing while still in the truck but now am having seconds thoughts about...
  4. luna negra

    Toyota wheels on '79 K5

    Recently bought some used toyota wheels w new BFG ATs (15"x31x10.5) for a steal. I had always heard you could swap 6 lug toyo wheels to squarebody chevy but not the other way around due to hub size so I bought them w/o measuring. Turns out, the front wheels rub on the tie rod ends by maybe...
  5. luna negra

    changing TH 350 oil pump seal while still in truck?

    I'm going to do a 305 to 350 swap on my '79 Jimmy and want to fix the weeping oil pump seal behind the torque convertor while I have the motor out. Buddy of mine said don't do this unless I pull tranny and stand it up on it's tailshaft. First I've heard of this but his reasoning is that...
  6. luna negra

    Need rocker panel/pan help

    I've got a rusty '79 K5 with some rocker and floor pan issues. I've never tried to do body work so before I start cutting and welding, thought I would ask here first. My main question is how much to take off and replace. The driver's side rocker is not that bad except for one part. Would you...
  7. luna negra

    Color wiring diagram

    Anybody have a colored wiring diagram for a squarebody (1979 K5) where the diagram matches the actual wire colors? I've got a black/white copy and but haven't been able to find one in color like this. For me, these are so much easier to trace things around. Have a starter that sometimes stays...
  8. luna negra

    Intro and is it worth fixing?

    Hey, new guy here from Central Texas. Just acquired this GMC Jimmy in a trade for some motorcycle mechanical work. I'm pretty handy with a wrench, but never really did any major body work. My question for the crowd here is this thing worth putting the money into fixing or is it a major...

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