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  1. 77 K20

    Do I rebuild my SBC or swap for an LS3?

    It can happen. On my old 400 I bought it and found out later some lobes on the cam were wiped out. Replaced the cam. Then my dad upgraded the heads on his 290hp 350 crate. They only had a few thousand miles on them so I put them on the 400. Instantly started using a ton of oil. It never leaked...
  2. 77 K20

    Do I rebuild my SBC or swap for an LS3?

    Yeah- I was hoping that coolant passage on that manifold under the TBI would solve my problems. It just created new ones. I have tried TWO of those manifolds and both have porous castings. Both let coolant creep thru and onto the floor of the intake manifold. And until you get some coolant temps...
  3. 77 K20

    Pro Flo 4- hate to try again after Edelbrock E-Street EFI

    So in doing more reading and research I found it won't be quite as "easy" as I thought. Apparently with pro flo 4 if you have a stock cam then you cannot use the 60 psi fuel pressures. Need their lower pressure of 49 psi. The Edelbrock fuel sump I have cannot be opened or modified. So then add...
  4. 77 K20

    Pro Flo 4- hate to try again after Edelbrock E-Street EFI

    I tried halfway even. It is happiest at 10-12 degrees. It seemed to surge even worse also at the more advanced timing. There was a reason they discontinued it in fairly short order. Sad it cost so much.
  5. 77 K20

    Pro Flo 4- hate to try again after Edelbrock E-Street EFI

    So I spent $2,489 back in September 2015 on Edelbrock's "New" E-street TBI fuel injection. Better than a carb, but has issues. It was the 1st generation. Had issues. They came out with a second generation. Had issues. Then the discontinued it. Problems: Cannot set the idle RPM to 650. My HT383...
  6. 77 K20

    Survey - Best posi trac/limited slip unit

    I've never had a Dura-Grip, but my vote is for the Eaton Tru Trac. I've had one for years in the front of my K20. Works perfect. Don't know it is there (no clunking, weird noises, etc). It just does the job silently. I liked it so much a friend of mine put one in the back of his 2001...
  7. 77 K20

    6 lug conversion

    I think that is your only option without swapping out axles. Do a disc brake conversion on the 14 bolt. Then get those Wilwood twin piston brake calipers all the way around. And if you did a hydroboost setup you'd have everything you'd ever need. If that isn't enough then the next step is a drag...
  8. 77 K20

    Headlight, driving lights.

    On my truck I switched from a 10si to a 12si as it made more amperage at a lower RPM. And I also put on a smaller pulley. I believe the stock one was 2.6" in diameter. I found one that was 2.342" For something like $14 it helps a bit at lower RPM.
  9. 77 K20

    Help Identifying lift height

    Are you always going to have the camper on it? Would be interesting to see the height with it unloaded. This is mine with 315/75R16s and a 5" lift.
  10. 77 K20

    Burnouts with a NP203 full time 4wd?

    I'm not too sure then. One idea would be if you can have someone drive it in a very tight circle in a gravel or dirt parking lot. Both right and left full circles while you are watching from outside. That might tell you something interesting. Any chance it has a locker in the front or rear...
  11. 77 K20

    Burnouts with a NP203 full time 4wd?

    Sounds like the transfer case is working then if it doesn't move when the hubs are unlocked. So do you feel it "grabbing" thru the steering wheel? Or? And this is at parking lot speeds?
  12. 77 K20

    Burnouts with a NP203 full time 4wd?

    No. It should be very smooth for doing tight turns. Are you sure you are not in the 4 HI LOC position? If your transfer case lever is all the way forward (LO LOC) or all the way back towards the seats that is HI LOC. In those positions the transfer case is locking the front and rear drivelines...
  13. 77 K20

    What? No one is off-roading anymore?

    Sorry- what is "FSR"? :shrug:
  14. 77 K20

    Do I rebuild my SBC or swap for an LS3?

    Warning: Long. It was a long fight for 2 years? Learned a lot. Hated the truck and engine for a long time. Still kinda do... I thought my HT383 crate engine with vortec heads was going to be the perfect engine for me based on all the reading and research I did. Turns out everything I read was...
  15. 77 K20

    33X12.5X15 Mud Terrain Tires

    What made you decide on 20s instead of a 17 or 18?
  16. 77 K20

    Ol’ Bonnie looks kinda silly now…

    Throw 2,000 lbs of gravel in the bed and complete the look with some "free" squat! :Big Laugh:
  17. 77 K20

    400 SBC Build

    Vortec heads removed the heat passage/plenum that used to go under the intake manifold. This isn't needed nor wanted when you have multi port fuel injection. However- if you don't have multiport injection you get a very cold intake manifold in winter. So cold that fuel can and will drop out of...
  18. 77 K20

    Poll: What '70s/'80s pickup would you own if a GM square wasn't an option?

    My parents had Wagoneers growing up. A '72 and a '78. They were ok- always like the Cherokee Chief better. Neighbors had one. My uncle had one of these:
  19. 77 K20

    Vortec heads spark plugs and dieseling

    Not sure if this helps or not but on the GM crate engine I bought with vortec heads (HT383) they said to set timing to 10 degrees BTDC at 650 RPM with the vacuum advance line to the distributor disconnected and plugged. They want 32 degrees of total advance when using HEI distributor P/N...
  20. 77 K20

    k10 drag link steering question

    I keep seeing posts all the time saying the drag link has to be level. This is only true on a stock height truck. You actually want to try and match the curve of the leaf spring. The stock springs were flat or a negative arch. So the drag link was flat. It deals with how the axle moves when you...
  21. 77 K20

    Holley Sniper and Gas Tank Swap

    Axles travel rearward when compressing. The leaf spring is attached at a fixed point at the front side of the leaf. Can't move forward. As the leaf flattens out it grows "longer". The shackle moves rearward and the axle shifts to the rear a bit in response. But I get what you are saying now...
  22. 77 K20

    Picture Please: No Spare Tire Holder

    Spare tire holders can be under the bed, or in the bed. Which are you looking for? Mine was upright in the bed right behind the driver.
  23. 77 K20

    89-91 LMC headlight upgrade

    My fingers work better when they aren't cold- but you do have a bit warmer temps over there. It would be ideal to pick a nice 65-70 degree day...
  24. 77 K20

    89-91 LMC headlight upgrade

    I have the glass Hella 7" round headlight housings. They take the H4 bulb... But you were almost right with the LMC idea- I did buy the LMC headlight relay wiring kit.
  25. 77 K20

    How to achieve tighter steering?

    And even if the frame isn't cracked it is still flexing. ORD sells braces that help strengthen and reinforce the frame up there. https://www.offroaddesign.com/steering/steering-box-braces-frame-repair.html

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