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  1. J

    1983 454 vs 5.3 LS for towing

    I would stay with the 454. The 5.3 is, I think, about 327 cubes, and to make matters worse, is cammed and ported for revs over low-end torque. I am leery about the 700R4, but others say it has been proven to be a good trans. You should look into your cooling system though and have your...
  2. J

    OEM radio speaker

    How much do you want for it? I need the plugs that go into the radio. Mike
  3. J

    OEM radio speaker

    Does anybody have an OEM speaker for a 73 Square? A complete one with the plugs? J. B.
  4. J

    8-track player install

    Problem with modern units is that they don't look right for one thing, and if we have 8 track tapes, we want to be able to play them, for another. J. B.
  5. J

    Deleting the Catalytic Converter

    Yes, it can be removed, as long as it is true that you don't have smog checks. You will have less back pressure, so potentially more top end. Mike
  6. J

    New owner of a Frankenstein K10

    The fact that it originally had a 305 explains the Turbo 350. With that 400, you should have a Turbo 400 trans. The Turbo 350 is for engines under 400 cubes. Carefully inspect the front spring hangers, as this truck originally had independent front suspension, so a previous owner converted...
  7. J

    8-track player install

    You just install it the same as a regular radio. If your truck never did have one, you need to find a wiring diagram. The old Clymer's paperback manuals have wiring diagrams for all the Squarebody trucks. You will need a magnifying glass, as they are pretty small and hard to read. J. B.
  8. J

    Installation manual for RCA 8 track player, model 20C405G

    Hello folks. Does anybody have the installation instructions for an RCA 8 track player, model 20C405G? It has been out of my 73 GMC for years, and I can't remember how to put it back in so it will be secure and properly grounded. I had instructions, but they are long gone, and there are none...
  9. J

    WTF!!!!!!! 75 Monte Carlo CUSTOM CLOUD sell or trade - $25 (PHX North)

    I remember those. They had to change the grille from flat to Veed, or else they had to stop making them. Mike
  10. J

    Towing with a 305 V8?

    If your gearing is right, it will do fine, but if you have that rediculous 2:73 - 1 rear end, it will struggle. You should use 3:73 - 1 gearing. Mike
  11. J

    Ls swap or not?

    This one is fairly new, but later on, will not be worth as much as a stock example. I say leave it alone.
  12. J

    Ethanol Free Or Premium Or Either

    Also, keep in mind that ethanol draws water out of the air. Not much of an issue for a daily driven truck in which you routinely run your tanks dry, but if you only have a single tank, or drive it infrequently, it definitely is an issue. J. B.
  13. J

    1986 C10- Is it reliable enough for a daily driver?

    One thing to think about in really cold climates is to use 2 gauge battery cables, and never ever try to use 6 gauge battery cables on an American-sized engine, meaning over 200 cubic inches. J. B.
  14. J

    1986 C10- Is it reliable enough for a daily driver?

    In good condition, these Squarebodies are VERY reliable, although I would go after a pre-computer year if I were you - no worries about costly computer replacements, no worries about said computers becoming "obsolete" and irreplaceable. Things to worry about are, if you want an automatic, as...
  15. J

    Daily driver turbo

    Stay away from turbos. Added strain on an engine will mean less, not more, reliability. Also, since you do your own work, if you insist on a blower, a supercharger is better on a gasoline engine than a turbo - less heat buildup, less complexity, no turbo lag. Turbos are better for diesels and...
  16. J

    How close are the aftermarket doors?

    I for one would much rather have a GM-made door than one from a metric country. Our trucks are not metric, so if they measure metrically and convert, chance for mistakes. I'll stick with American-made.
  17. J

    81-87 Front Clip on a 73

    The inside hood release was an option on the 80 and older. My 73 has an inside hood release. J.B.
  18. J

    Shudder while taking off

    Another thing that can Does your engine run smoothly at idle and low RPM? Having a weak cylinder can also cause clutch chatter. Mike
  19. J

    Running boards

    If it is a pickup, I have a 2nd set of chrome step bars that have never been opened. The set that I installed on my GMC C25 required me to have different rear mounts fabricated. If you can come and pick these up, you can have them for $50.00. Mike
  20. J

    Running boards

    Is your truck a pickup or is it a Suburban?
  21. J

    Gross Vehicle Weight for 1973 GMC C25 Camper Special

    Thanks
  22. J

    Gross Vehicle Weight for 1973 GMC C25 Camper Special

    What is the true Gross Vehicle Weight of a 1973 GMC C25 Camper Special? James
  23. J

    Valve seat refacing tools

    I want to do a valve job on my 292, but all the valve seat refacing tools are made in India or China, and are metric. Where can I find an AMERICAN MADE set, sized in OUR measurements?
  24. J

    Dual carburetors on 250 I-6?

    I have a 292 with an Offenhauser dual single-barrels, and I am using a pair of Rochester B type 1 barrels for a 235 - a pair of carbs for a 292 might be too much for my stock-cammed engine with stock ports head, and that carb has to have a manifold-mounted automatic choke. I have headers - and...
  25. J

    Dual carburetors on 250 I-6?

    I think you will have to try Aussie Speed Or Offenhauser . They both have a 4 barrel manifold and they have 2 - 4 adapters that will allow you to use a 2 barrel, maybe a Rochester 2GC, which should be perfect for your engine. Offenhauser also has linkage for their 4 barrel manifold, so you...

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