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  1. Bextreme04

    Rotate 350 «backwards»

    You definitely need a tool if it is a fresh build and you are trying to find MECHANICAL TDC to get an accurate mark on the harmonic balancer. If you are just trying to make sure that you are on #1 TDC for something like aligning the distributor, then you shouldn't ever need one. The way to...
  2. Bextreme04

    "Monster" brand TH350?

    100%... unless you are doing a TV show and have no time to actually have a transmission built or are just not from the area that you are rebuilding the car in, it never makes sense to order a trans from a big box company. If you are doing big power or edge of the envelope kind of stuff, then you...
  3. Bextreme04

    "Monster" brand TH350?

    There are known, documented, cases of people getting a "stage" transmission from them with a shiny coat of paint on the outside... and when it is torn down it immediately becomes clear that it has old used parts inside an otherwise completely stock transmission. I've also seen things where it...
  4. Bextreme04

    Best radiator fan kit -Alloyworks?

    There is no such thing as a 4-core once you go to aluminum. The equivalent thickness 4-core brass radiator is a dual core aluminum. The tubes are squished flat and have internal turbulators in the tube to improve efficiency because the aluminum is inherently less efficient at dissipating heat...
  5. Bextreme04

    4l80e conversion in 1985 suburban. What parts do I need?

    What year is the 4L80? If it's a 97+, did you use the correct rear cooler line fitting?
  6. Bextreme04

    4l80e conversion in 1985 suburban. What parts do I need?

    I'm no builder... but that looks like a **** trans build to me.
  7. Bextreme04

    Best radiator fan kit -Alloyworks?

    Somebody swapped in a smaller radiator at some point. My 1980 K25 had a 4-core brass radiator in it originally and it fit in those upper mounts on that top flat panel. I have swapped in an aluminum stock 97 K2500 Suburban Radiator and stock 2014 2500 pickup electric fans.
  8. Bextreme04

    CAM SURGE

    Have you already adjusted the idle mixture? You should get a tach and adjust using the idle drop method. Set the idle mixture screws lightly bottomed out(all the way in clockwise) then back them each out 1 turn. Start the truck and let it fully warm up. Make sure the choke is off. Set...
  9. Bextreme04

    Remove O2Sensor

    This is the way
  10. Bextreme04

    Remove O2Sensor

    Usually one tank of gas will do it.
  11. Bextreme04

    Needs MORE POWER!!! (Tim Taylor Style!!!)

    There's only two real solutions to this problem. The first one is displacement.. there really is no replacement for displacement. Drop a warmed over 454 in there and be done with it. Unless you are willing to do the second option, which is the only acceptable replacement for displacement...
  12. Bextreme04

    I would really like a turbo 400 in my truck

    I have a Figure 8 NP205, so that's what I needed to do. I swapped in a long 2wd output shaft when I rebuilt the 4L80 and added the rear reluctor gear at the same time. The TH400 I am replacing has the long ~4.5" output shaft, so you have top do that. On an 80's NP208, you don't need to do that...
  13. Bextreme04

    Need a breather for my 1987 7.4L "N", ideas?

    These guys seem to have exactly what you are looking for. NOS or take-off used parts. https://newboyzsquarebodyrescue.com/products/tbi-valve-cover-breather-tube?pr_prod_strat=e5_desc&pr_rec_id=5b2c499df&pr_rec_pid=6966919757891&pr_ref_pid=6977999405123&pr_seq=uniform
  14. Bextreme04

    fuel line clamps

    The feed and return are zero PSI.. feed should actually be a vacuum most of the time. The only line on the pump that sees pressure is the outlet to the carb itself, and that is a solid metal line with a flare and tube nut.
  15. Bextreme04

    Is this a good pattern for gm 14 bolt ff?

    Looks great to me. That's pretty much exactly what mine looked like when I rebuilt the rearend a few years ago. Factory 8600GVW K25 with 350/TH400/NP205, 4.10's, and 35's. I've towed and hunted in it for years since the rebuild and had zero issues. I added a grizzly locker at the same time as...
  16. Bextreme04

    WANTED: Canopy for K20

    I see them all the time around here. I'll keep an eye out for you. You might try hitting up ChadTheMan on facebook also. He has a squarebody scrap business in the BattleCreek area and might have a line on one for you.
  17. Bextreme04

    Need help identifying 12v wire for electric choke

    The factory setup in the later 80's models used a two prong NO oil pressure switch mounted in the 1/8 NPT port right above the oil filter. You would run a 20A feed from an ignition source in the fuse box to the oil pressure switch, then out of the oil pressure switch to the choke. This switch...
  18. Bextreme04

    Changing An Automatic Flywheel Without Removing the Transmission

    I had to do this on my LS when I forgot to torque the flywheel bolts on a 5.3 to 6.2 swap. I bought 4-1/2" long bolts from the hardware store, swapped them out on two top bolts and two side bolts. I was able to slide the 6L80 and transfer case back enough to remove the bolts, add red loctite...
  19. Bextreme04

    What have you done to your square lately??

    That looks exactly like the C.R.Lawrence back glass I got out of a junkyard for my truck. All aftermarket sliders use the factory non-slider gasket. As far as I know, there are no companies making a clear rear slider replacement for our trucks. Looks like Brothers bought them out at some point...
  20. Bextreme04

    What have you done to your square lately??

    It's a high temp because its in the pressure test port. That is the absolute worst place to put a temp sensor and borderline useless. You need the sensor in the pan or you aren't really getting any good info at all. The pressure test port is a dead head and is really only going to be giving you...
  21. Bextreme04

    Evaporator Housing Cover Necessary?

    I got both from O'reilly. They have a 30/40 Amp one listed or a 15 Amp. I assumed the 30/40Amp was the correct one and it was not. The one I got that was not correct was PN: RY117. I then exchanged it for the(more expensive) PN: RY23, that says it is only rated for 15 Amps and it has been...
  22. Bextreme04

    Evaporator Housing Cover Necessary?

    Also, my blower motor started acting up and it turned out to be a combination of a few things. The power feed for the blower motor goes through the fan switch, the resistor, the relay mounted next to the resistor and the blower motor on the housing, and then into the blower. So anything within...
  23. Bextreme04

    Evaporator Housing Cover Necessary?

    Picture? I've never seen a cover over the housing that also covered the blower motor.
  24. Bextreme04

    Pretty sure I blew a head gasket this morning....

    Make sure to test the cap and the radiator separately. Make sure to test the engine side with it filled up with water. Attempting to pressure test an empty cooling system is a bomb waiting to happen.
  25. Bextreme04

    Pretty sure I blew a head gasket this morning....

    My first thought is that you should make sure you didn't lose a hose somewhere. All of your symptoms could have been from an air bubble in it from when you filled it back up or a blown/loose coolant line somewhere. If it had just gotten up to temp and the system pressurized for the first time...

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