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  1. xm20k

    1978 k30 hydroboost

    A brand-new Hydro unit specifically for a square is under $600 https://classicperform.com/shop/7387hbk-bsb
  2. xm20k

    M715

    They make awesome off-roaders.
  3. xm20k

    Hydraulic booster options

    If you're looking for a new unit, the CPP one fits without messing around with bracketry It's the one I'm running https://classicperform.com/shop/7387hbk-bsb Comes with the correctly angled bracket for GM trucks.
  4. xm20k

    M715

    Nice project. Regret selling mine ages ago. Factory made a whopping 115HP and with 5.88s it'll do a blistering 55 downhill with a tail wind. Don't believe any were built as a dually.
  5. xm20k

    What have you done to your square lately??

    Have it punched to 4.060 and make it into a 388. I would also just have them cleanup the deck surface and not knock it down to 9" with a small chamber and thin gasket should be in the 9.5-9.75 CR range with the 2 valve relief flat tops. Will make more than enough torque to get in trouble with...
  6. xm20k

    Wiring in Tach

    You guys beat me to it your google is faster than mine apparently.
  7. xm20k

    65-66 BBC 396 Cam groove question

    I run a bunch of their valve train parts for that very reason they answer the phone and respond very quickly if messaged. They even sent me an extra pair of retro roller lifters when I ordered my set right then from them because they were the only ones to answer their phone.
  8. xm20k

    86 K10 starter won't stop cranking

    So, for those wipers auto or manual? Engine size? Once you said it, I realized that's why I don't deal with the local parts stores much anymore. Summit delivers in a day, or I can drive a half hour and get it with no dumb questions.
  9. xm20k

    86 K10 starter won't stop cranking

    They match the tooth count of the flywheel/flex plate noted by different bolt pattern, other wise the same. I believe originally GM did use a cast iron nose on the manual ones but that went away as far as I know.
  10. xm20k

    Issue after crossover steering installation

    Measure the pully and tell us what it is. I'm betting it has the big pully and should have the small one, so it turns faster.
  11. xm20k

    Vortec 350 Coolant Bypass Solution

    They even sell T stats with the holes already in them I have one in mine.
  12. xm20k

    Let's discuss Thermostate modification to aid in cooling!

    I have a few here that are just a big brass washer with different size holes 1/2" 5/8" and 3/4"
  13. xm20k

    Let's discuss Thermostate modification to aid in cooling!

    All he did was make a flow restrictor. All this will do is make it warm up slower than the rad will keep it under control from there, at least it should if not something isn't right, but this is typically a race thing because no heater to worry about and no stat to stick and cause the engine to...
  14. xm20k

    Missing a bit of side molding on my 85 scottsdale...

    https://www.lmctruck.com/body-components/molding/cc-1981-87-pre-cut-body-side-molding-set I find that only the upper trim levels pieces are reproduced the Silverado side molding but not Scottsdale etc. Went thru the same thing with my truck it should have this trim, but no one reproduces it. 
  15. xm20k

    Engine/Trans help

    I think someone at BP is pulling crap out of their backside to use as an excuse to deny warranty claims maybe, a lot of people run spacers on aluminum water pumps, mine has a 3 inch spacer because of the short style pump even if it was a long pump, it would still need a spacer. Not a BP...
  16. xm20k

    What new tools have you got lately?

    I have the older grey version of that and still had to swap stock springs back in as it would not fit under the crossmember if a tire was flat.
  17. xm20k

    Engine/Trans help

    Agreed if you're still going to do truck stuff with it or drive it a lot you can make 300-350 with mostly stock parts and be a daily driver without getting into a lot of other stuff much more and then you're going to hate the time and added expense of a torque converter, trans rebuild, fuel...
  18. xm20k

    HEI Modules

    Can tell from the first two pics that's chinesium. I've never seen them not put thier logos and patent numbers etc. on stuff like that.
  19. xm20k

    HEI Modules

    I have that same box sitting here bought brand new but could not get the programing to work, it would start run for 2 seconds and shut off plug this one in (same harness and wiring) fired right up and idled immediately. I'm going to try again on the other engine I have here and if anything, else...
  20. xm20k

    What is holding my rotor on?

    Try reaching into the back and back off the shoes with the adjuster if no slot in the backing plate hit it with your big purse.
  21. xm20k

    What have you done to your square lately??

    I have had no luck with them from 2 different places but one was a yellowish tinted the other blueish haven't seen any that were just straight clear like in the video.
  22. xm20k

    79 GMC Street Coupe - Stock Drivetrain

    Dug out the sticker nothing about rearend. But I'm almost positive it had 3:45 stamped in the ring gear, may have been changed.
  23. xm20k

    79 GMC Street Coupe - Stock Drivetrain

    Pretty sure it was. At one point I was going to rebuild and regear it before I just said screw it and swapped the 9" in and that's the number that comes to mind.
  24. xm20k

    Cold Weather Hydraulic Oil

    Anything that takes Hydro I use this from the equipment at work to the powerglide in my truck with some type F mixed in to see it on the stick, in my engine hoist and floor jack never had an issue in the winter either. https://www.summitracing.com/parts/mob-124788 Says not to use it in a...
  25. xm20k

    What have you done to your square lately??

    Had the same issue with those heat shrink would burn up, and the solder never melted.

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