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  1. Matt69olds

    Fuse block connectors

    This what your looking for? https://www.summitracing.com/parts/aww-500429
  2. Matt69olds

    Transmission Identification

    Bingo!! One piece case confirms it. Easiest way to tell a TH250 from a th350 is the band adjusting screw on the drivers side of the case.
  3. Matt69olds

    six cylinder won't start in the morning

    Let it sit overnight. Don’t move the throttle, remove the air filter housing. Once again, don’t touch the throttle, open the choke plate. Look down the throttle bore, and look at the accelerator nozzle while you move the throttle. You should see a solid stream of fuel. If not, either the carb is...
  4. Matt69olds

    Some hesitation and stumble 85 k20

    Is the accelerator pump adjusted right? You should see fuel come from the pump shooters with the slightest movement of the throttle.
  5. Matt69olds

    Power door lock conversion

    I used G body lock actuators on my 81. The actuator is pretty common, it’s used in S-0, later full sized trucks, vans, big cars, your local junkyard is probably full of them. Will the door latches from the later trucks fit the earlier doors? If I remember correctly, there is a separate...
  6. Matt69olds

    Modulator vacuum line

    Steel line with a couple inches of rubber hose on the ends for the connection. Todays useless bit of tech: ever wonder why GM put that loop in the modulator line? It’s to prevent condensation from collecting in the modulator. Let me explain. Imagine a bunch of short trips in cold damp...
  7. Matt69olds

    Is there a good spot for keyed power under the hood?

    Get a fuse box of your choice, use a relay to power the fuse box from a fusible link connected to the battery. Use the wiper power feed, HEI power wire, or an unused ignition power port on the original fuse box to trigger the relay.
  8. Matt69olds

    Th350 spews fluid

    The Full mark on the dipstick should be even with the parting line of the case/pan. Obviously, this will require pan removal to verify.
  9. Matt69olds

    Quadrajet Air Fuel Ratio

    Give the engine what it wants, not what you think it needs. You will probably find the ideal cruise AFR is far leaner than you ever thought possible, or would be willing to go on your own, and the engine will be perfectly happy. I’m Set the idle mixture using the lean drop method. The engine...
  10. Matt69olds

    On this day, a couple of fails (car alarm, door locks, and horn installation)

    Look at the turn signal switch connector. There will be a black wire. That’s the horn relay trigger wire. Ground it, you should hear the relay click, and hopefully the horns sound. Headlight power coming out of the headlight switch is either yellow or light blue. Look at the headlight dimmer...
  11. Matt69olds

    Idle Mixture Screws Do Not Adjust Anything on 1974 454.

    Fix the obvious things first, starting with the vacuum advance. While the distributor cap is off, make SURE the distributor weights under the rotor are free to move, and return to the rest position. If the weights are sticky or frozen, it’s going to run like crap. It’s easy to make your own...
  12. Matt69olds

    My thoughts on spare alternators

    Some batteries have a Reserve capacity rating listed on the label. Reserve Capacity is how long a fully charged battery can support a constant 25 amp load before the voltage drops below 10.5 volts. Since most modern cars will run on 10.5 volts (obviously you can’t START it on 10 volts) the...
  13. Matt69olds

    34 inch tirers speedometer reading

    Well crap, it’s been awhile since I used the TCI speedo gear calculator. I didn’t know they discontinued it. Looks like they still sell the gears. I did a quick google search, JEGS has a calculator as well...
  14. Matt69olds

    34 inch tirers speedometer reading

    https://www.tciauto.com/catalogsearch/result/?q=tc+speedometer+gear+calculator&amnoroute You need to know the current tire diameter and either the drive or drive Gear tooth count.
  15. Matt69olds

    MSD 6AL fuse?

    You don’t NEED 10 gauge, assuming the msd draws an amp or 2 per 1000rpm, 14 gauge is sufficient. I used 10 just because that’s what I had at the time. Put the fuse as close as possible to the battery, and run the wiring carefully.
  16. Matt69olds

    86 K20 4x4 350 Holly Carb - Crank, No Start

    Read this: https://www.gmcmi.com/wp-content/uploads/2014/05/HEI-Testing.pdf
  17. Matt69olds

    MSD 6AL fuse?

    The idea of having an unprotected wire running across the engine compartment has zero appeal to me. Use a fusible link, or overkill fuse. On my Olds, I have the 6AL box mounted behind the passenger headlights. It’s on a place with lots of airflow and out of the way. I used 10 gauge wire with...
  18. Matt69olds

    rebuilt sbc Oil pressure

    Cut the oil filter open. If there is no metallic debris, relax.
  19. Matt69olds

    HEI ignition module relocation

    If it ain’t broke, don’t fix it. Find good Delco modules in a junkyard, or get top quality napa modules. And DONT use dielectric grease, use the proper thermal paste. They are not the same stuff.
  20. Matt69olds

    Do I need an electric fuel pump!

    Windowed style on the left, solid on the right.
  21. Matt69olds

    12v ignition switch source

    Use this: https://www.revolutionelectronics.com/Products/Fuel_Pump.html Wiring a pump to run anytime the ignition is on isn’t a good idea. Yes, people do it all the time, but it not smart. What happens if someone plows into you and you’re unable to reach the ignition, or worse unconscious...
  22. Matt69olds

    4L80 on FB Market Place

    That’s definitely a good deal.
  23. Matt69olds

    TH400 Direct Drum/Sprag Question

    Make sure you take some detailed notes on how far down in the bore each bushing sets. Before I had the fancy bushing driver tools, I used a cam bearing installation tool for a lot of bushings. Once again, unless your planning to build a lot of engines and transmission’s, it’s probably best to...
  24. Matt69olds

    TH400 Direct Drum/Sprag Question

    As long as your sure you will never swap out the small block for a rowdy romping stompin big block, the upgraded sprag type drum isn’t worth the expense. Since you are towing with it, I’d definitely do the dual feed conversion and replace the rear thrust washer with a bearing. Drill the feed...
  25. Matt69olds

    Operation "Save the driveway"

    Go to your nearest parts store and buy a bottle of A/C oil with the fluorescent dye. You will also need a black light, you can get that at the parts store also. Add a little to the fluid and take it for a drive. Once the drive is over and the truck has cooled down, crawl underneath and shine...

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