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  1. MikeB

    carburetor size on a 350

    Yes, but the Q-jet primaries are tiny for great throttle response, and the secondaries open just enough the satisfy engine demand, which is not 100% open on a 350. That was the beauty of those carbs. You could probably put one on a 265 and it would work just fine running around on the tiny...
  2. MikeB

    'Puff' on start up! valve seals need replacing....

    Sounds like what's happening is oil is slowing leaking past guides into cylinder(s) when engine is not running. If your heads don't have push-on seals, oil leaking past guides can be at least temporally cured by installing these "umbrellas" seals on the valve stems under the retainers. Al they...
  3. MikeB

    8.5 inch 10-bolt overhaul kit

    USA Standard/Yukon Gear overhaul kit for GM 8.5" 10-bolt differential Brand new in shrink wrap USA-made Koyo bearings and races Also includes pinion seal, shim kit, ring gear bolts, pinion nut, crush sleeve, and marking compound. $50 plus actual shipping costs, or pick up near Fort Worth, TX...
  4. MikeB

    Gas tank pressure - air rushes out when the the gas cap is unscrewed

    I really like the evap system. No gasoline smells in the garage! On my 82 the vent line ran from the tank to the canister, as usual, but then just vented to atmosphere, because I didn't have a purge valve or carb designed to work with it. Still had no gasoline smells because the path to...
  5. MikeB

    Who has Experience with Sunex Low-lift Transmission Jacks?

    The bad Amazon reviews seem to be mostly from guys doing heavy duty truck work. I'd say it would probably work fine with any auto trans you'd find in a car or light truck. However, if you buy it from Summit, they will take care of you if you have a problem. They will also match the lowest...
  6. MikeB

    Terrible Gas Mileage

    Did it get better mileage in the past? Does the engine run as well as it always has? Does it by any chance have an old cat convertor? How about a closed heat riser valve? Does your 1985 model have an electronically controlled Q-Jet? Depending on axle ratio and tire height, 12-14 mpg should...
  7. MikeB

    Best Cordless Tools?

    I only have one Milwaukee tool, a heat gun. It looks and feels like quality, and it's served me well for many years. Bought it to replace a $15 HF gun that started shooting flames (!) the second time I used it.
  8. MikeB

    Best Cordless Tools?

    I've had good service from a Bosch 18-volt 3/8" driver/drill and 3/8" impact wrench. I've owned the driver/drill and two lithium ion batteries for approx 15 years. Bought the impact wrench a few years later -- tool only, no batteries. Those original batteries still hold a charge a lot longer...
  9. MikeB

    Lunati street master

    If your main things is a lopey idle, then that cam should do it. It's similar to the old 350hp/327 cam but with a tighter LSA for engines with lower compression than 11:1. What's your static compression ratio? I'm guessing the cam would like at least 9.5:1. With less than that, your lope...
  10. MikeB

    Cut New Dash Pad For Speaker Install?

    I used a dash pad from Cheyenne Pickups that had perforations for a center dash speaker, which let me use this 4x10 RetroSound speaker. Certainly not great, but much better than OE, and would be a good combo with some 6x9s mounted in enclosures behind the doors...
  11. MikeB

    New TH350 shift linkage from Lokar

    I bought one of those kits several years ago when I converted an 82 C10 to TH350 from 3-speed manual. I also used a rebuilt 82 tilt/auto trans column. First problem: It was not a straight shot from the lever on the column to the trans shift stud, so I had to bend the Lokar rod. Next: The...
  12. MikeB

    What new tools have you got lately?

    Cabinet for my bench drill press and more storage. https://www.homedepot.com/p/Husky-28-in-W-x-33-in-H-x-18-in-D-1-Drawer-2-Door-Steel-Garage-Base-Cabinet-G2801B-US/304082053
  13. MikeB

    New Member from PA

    Looks like a survivor. Job One: replace that rear bumper.:)
  14. MikeB

    how long does polyurethane last?

    I replaced worn suspension bushings with poly on 69 and 82 pickups and a 55 Chevy car. I did not notice a stiffer ride over tar strips, etc. What I did notice was (1) better steering response with poly control arm and sway bar bushings, (2) less engine movement with poly motor mounts, and (3)...
  15. MikeB

    Camshaft flexibility for 1978 350

    The CL08-503-8 cam is for 1986-up factory roller cam blocks, also known as "one piece main seal" blocks. https://www.speedwaymotors.com/COMP-Cams-CL08-503-8-Xtreme-Energy-Hyd-Roller-Camshaft-Kit-GM-305-350,222838.html Comp probably has a "retro-fit" cam for earlier blocks, but they get very...
  16. MikeB

    Summit Carb Install Gone Very Wrong

    Looks like simply a bad casting. As for the carb, a buddy of mine has run the 600cfm version for around 8-10 years now. It worked great out of the box, and all I had to do was adjust idle mixture and speed. It's based on the old Holley 4010 series, with supposedly a few improvements. I...
  17. MikeB

    383 vortec high compression

    Last thing you want to do is lower compression by adding thicker gasket. That can easily make matters worse! I didn't read all the advice above, but want to add that what you need is pistons with a D-dish, like these...
  18. MikeB

    4L80E or GV Overdrive for my '90 Suburban?

    R2500 = 2wd, right? If so, why not take the simple route and change the ring and pinion to something like a 3.42, or whichever ratios are available for a 3/4 ton diff? RPMs would drop around 17%, and you'd still have converter slip to get you moving in first gear. I know my old SWB square...
  19. MikeB

    my whacked column rebuild

    Sounds like the OP is well on his way, but this is for future reference: I bought a very nice rebuilt column from Wayne at GM Tilt back around 2015. His after the sale support was great. I highly recommend him. http://gmtiltsteeringcolumn.com/
  20. MikeB

    Overheating “slightly” and infrequently

    Some electrical gauges will display different temps depending on voltage. For example, with ignition on, engine not running, and battery at 12 volts, a gauge might read 180. But fire up the engine, voltage jumps to 14 volts, and the gauge might read 190 or more. If you have a voltmeter, you...
  21. MikeB

    rear drums not workin

    Did you use new shoes on drums that have been turned? If so, the arc of the shoes will have a smaller radius than the arc of the drum. That causes only the center 1/3 or less (!) of the linings to make contact with the drum. Back in the day, shops would "arc in" the shoes so the entire lining...
  22. MikeB

    Need advice--Camshaft degree issue (maybe??)

    Just read your last post. If LSA is 107 (214 at the crank), then "straight up" would be 107 ATDC. So with intake center line at 102 ATDC, that's 5 degrees advanced, as you said. But using a stock timing set you would still get 5 degrees advanced, not 9 degrees. Where am I wrong here? Is...
  23. MikeB

    Need advice--Camshaft degree issue (maybe??)

    Actually, that's probably perfect! I know that most, if not all, of Comp's small block cams are drilled to be 4 degrees advanced with a stock timing set. So I'm assuming the same is true for your Olds cam. Good article here...
  24. MikeB

    Well crap

    They're not cheap, but I really like the Melling Select pumps. I have used the #10552 small block pump a couple of times with the #12558 3/4" diameter bolt-on pickup, which you can adjust for pan clearance. Description: Melling's years of experience are apparent in these Performance oil pumps...
  25. MikeB

    I'am Going To Build A Smooth Idle 427

    That should be a fantastic torque monster! Where did you get the camshaft and lifters? And is the manifold NOS? If not, how did you get it so clean? Super clean shop you have there!

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