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  1. Bextreme04

    Fuel return help needed

    Yep, three port pump and three port sending unit. I explained in detail what that plumbing should look like in Post #5
  2. Bextreme04

    Fuel return help needed

    I would put at least a one way check valve on it to keep debris and bugs from getting in there and clogging it up. You will get a fuel vapor smell from having just the open line. It would have originally run there to a charcoal canister to control the smell and recycle the fuel vapor back into...
  3. Bextreme04

    Fuel return help needed

    My thought is that someone put in the wrong pump or wrong sending unit, or both. If you had a return line system from the factory(not all did), you should have a 1/4" return line and 3/8" feed line running from the switching valve to the pump area. It will be steel hard line and will bend out...
  4. Bextreme04

    Steering box frame reinforcement weld in plates

    If you do any wheeling, this is a great kit as well. Allows you to mount a winch hidden up in the frame and strengthens up the entire front frame structure. Also includes an interior brace to the back side of the steering gear. The shackle brackets are really nice and heavy duty as well. I've...
  5. Bextreme04

    Where to get quadrajet rebuilt?

    I got an APT adjustment tool from them a year or two ago. They sell stuff on amazon and ebay as well, seem legit. They are a bit harder to find a correct rebuild kit for, or at least it was harder for me to navigate their website... might have just been me
  6. Bextreme04

    Where to get quadrajet rebuilt?

    The absolute best place IMO is the man himself, Cliff Ruggles. He is the author of pretty much ALL of the go-to books on rebuilding and modifying quadrajets. You can order rebuild kits for your specific carb number, get the entire thing rebuilt, or even just get specific questions answered on...
  7. Bextreme04

    Think I need new springs? shocks? ROUGH RIDE

    They aren't always a set weight. The difference in weight can vary by quite a bit depending on what engine/trans combo you have and what accessories have been installed. If you have a 454/th400/np205.. you are going to be many hundreds of pounds heavier than a 292/700R4/NP208 would be. Same...
  8. Bextreme04

    1978 GMC K25 under grille

    I have an '80 K25, they should be the same core support from 78-80. Mines assembled, but you can see the bottom mount from underneath. Here's what mine looks like.
  9. Bextreme04

    Advice and Parts recommendations for some 6.2 cam/valvetrain work?

    I think the stock springs are only good to ~0.550. I said stock, but I meant the PAC or BTR beehive springs. They are good up to ~0.625 and are supposedly more reliable and longer lasting for a daily driven type of application...
  10. Bextreme04

    Advice and Parts recommendations for some 6.2 cam/valvetrain work?

    Keep us updated on what you find.. I'm really curious to see how this plays out
  11. Bextreme04

    Advice and Parts recommendations for some 6.2 cam/valvetrain work?

    Yeah, I got the Stage 1 L92. Now they only have the Stage2 VVT and it is a second Generation of that cam with more lift. They no longer offer a stage 1 version. I was very tempted to go with a non VVT version and convert to a 3 bolt cam gear.. hopefully I won't regret it. Another thing I saw...
  12. Bextreme04

    What have you done to your square lately??

    I highly recommend a sway bar disconnect kit. I have the exact same springs and shocks on mine. Before the sway bar disconnect kit, it was rough. Sway bar connected with the disconnect kit, back to feeling about like it did stock, then with the sway bar disconnected, rides great.
  13. Bextreme04

    LS 5.3 High Idle

    The 02 sensor not responding and the high idle could be related. Do you have a way to log live data? I would go look at what the 02 is actually doing, then see what IAC is doing, what TPS is reading, and what make sure you are getting data on important sensors like IAT and CTS. The computer is...
  14. Bextreme04

    Vacuum hose routing

    I agree with everyone else, I would read the diagram the way you stated. I also don't think it would matter, it is just a plunger inside that connects the two passages, shouldn't matter for the two port versions. There ARE some special ones with three or more ports where it does matter. Those...
  15. Bextreme04

    No fuel in carb at start up

    But it runs fine after it starts? What carb do you have?
  16. Bextreme04

    Want to build a good horsepower, good fuel economy engine for a 1978 c20 with stock 350. I don't know much and need help.

    The early quadrajets that used the thermostatic spring for the choke operation have the manifold vacuum in the spot he has it hooked up at. That is the correct location. When they went to the hot air choke in ~78, you end up with the big choke piece on the side that covers up that port and is...
  17. Bextreme04

    Useful parts on a '96 K3500 for a Squarebody?

    I used the fuel pump, fuel lines, wiring harness, vapor canister, radiator, radiator lower support, trans cooler, windshield washer tank, secondary battery tray, overflow tank, and a few other odds and ends when I did my swap. I bought the donor for $500 and sold ~$1000 worth of parts off it...
  18. Bextreme04

    Fuel injection conversion

    The 305 is notorious for being super sensitive to detonation when the ESC is not functioning properly and also being a total dog if you retard the timing enough to not detonate without it. You need to see if the FiTech documentation actually tells you what the spec is on the TPS. If it doesn't...
  19. Bextreme04

    Fuel injection conversion

    Holley owns MSD... it's the same one(even has the same part numbers). You can even see in the pictures that everything is labeled MSD and the TBI has MSD molded into the end of it.
  20. Bextreme04

    Fuel injection conversion

    Maybe we are all confused on what is being asked here. I read his initial post as his original quadrajet has an electronic TPS and he doesn't know what he is supposed to do with the original wire going to that when he swaps the FiTech on there. It seems like the GM TPS signal has always been...
  21. Bextreme04

    Fuel injection conversion

    86 is a Quadrajet with the electronic idle mixture valve. I think the TPS is only used for that and the ESC system... I don't think it has much of a "computer" like an 87 did.
  22. Bextreme04

    Advice and Parts recommendations for some 6.2 cam/valvetrain work?

    I used GM trays and Delphi LS7 lifters sourced through Michigan Motorsports. I used factory GM 6.2 headgaskets from Summit. They are only ~$30 each I think. I also did an ARP headbolt kit at the same time, because why not. You might want to run a compression test on it, both to see what the...
  23. Bextreme04

    Fuel injection conversion

    The FiTEch would replace that system, but I'm pretty sure it is used for the ESC system on those 305's... probably not the same signal. You DO know that you won't pass california smog with that system... right? The only CARB legal Carb to EFI conversion I know of is the MSD Atomic EFI...
  24. Bextreme04

    LS swap fuel system

    It has more to do with flex fuel and pump design. The newer stuff is PWM controlled and doesn't have a "regulator" at all. It is a returnless system that uses a fuel pump control module, PWM, and a fuel pressure sensor to keep the inlet pressure where it wants it at all times. My 2011 Suburban...
  25. Bextreme04

    Fusible Link?

    Interesting... you should have had a bunch of other inoperative stuff too then.

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