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  1. J

    Please look over my emissions “delete”

    I agree about the canister and about possible vacuum leaks, but I hate EGR. It considerably reduces torque at light to part throttle cruise, forcing you to use more throttle than you otherwise would use when you encounter a grade or want to increase your speed some. Also, in about 1980, GM...
  2. J

    New UK based member

    Welcome friend! One thing you should know is that pre 1975 vehicles, and certain 1975 and 76, such as the Heavy Chevy, don't have a catalytic converter and don't have to be smog checked. Something to keep in mind!
  3. J

    Want to build a good horsepower, good fuel economy engine for a 1978 c20 with stock 350. I don't know much and need help.

    You can't get high horsepower and good mileage at the same time. If you want lots of low RPM torque, you will have to forget about lots of top end horsepower. Ditto for good mileage. Aggressive cams mean poor mileage at low speeds. If you do a lot of towing and/or load your truck up with...
  4. J

    Spray vs Plastic Bedliner

    You could still get the wood floor on Squarebody Fleetsides? Didn't know that, as I never saw any and never saw any advertising for them, and have never seen replacement floors for them. Good to know. J.B.
  5. J

    Fresh oil

    Probably just your imagination because you know you are doing something good for your engine. My brother used to think the same thing, then I borrowed his car, which he said needs the oil changed, and told him I changed it. It swore it ran better, then I showed him the dip stick. Ha Ha. I...
  6. J

    The wisest way to modernize a C20

    Great additions! That dump bed is hecka kool! When I saw "moderize", I thought that would mean LS engines, computers, etc., and was wondering, "why"? Why add everything bad about today's vehicles to a perfectly good truck? J.B.
  7. J

    The wisest way to modernize a C20

    KOOL! J.B.
  8. J

    Radio Block off plate

    Wow! That sure is rare! How much do you want for it? J.B.
  9. J

    Radio Block off plate

    How much do you want for it? J.B.
  10. J

    Spray vs Plastic Bedliner

    Step-side owners can gloat about this, as they have wooden bed floor! My brother almost bought a seldom-seen long-bed stepside in 87. Too bad he didn't, as they are as rare as hen's teeth, and the bed sides and tailgate are pretty much the same from 1954 - 87, even later on 1 tonners. J.B.
  11. J

    Spray vs Plastic Bedliner

    That's what I was going to say, as plastic traps water, and water causes rust. Spray-on is better in that respect. Plus, back in the day, there was no such thing as bed liners, and we managed OK. J. B.
  12. J

    How much oil pressure is to much for a stock 350

    Sounds OK to me. If your oil pressure was, say 80 PSI, you might have excessive oil consumption, but your's looks normal for a good tight engine. James
  13. J

    Help!!! Flywheel bolts keep coming loose

    Possibly the flywheel is the wrong one, and is slightly loose on the hub, or the bolt holes are too large. Never heard of that happening, so only guessing.
  14. J

    Smog thoughts

    Getting rid of the converter MIGHT help with top end, (less back pressure, lower pumping losses), getting rid of EGR will GREATLY help part-throttle performance, re-working your advance curve can give a good boost, but removing the AIR pump won't do much that you can feel, but it will reduce...
  15. J

    Smog thoughts

    That is correct. Part of the EPA's effort to try to force us to replace our vehicles with computerized Japanese cars.
  16. J

    Changing from 80 square headlight back to 74-78 round headlight question.

    Sell the old bezels if you don't want them. Do not throw them in the garbage, as they are no longer being made, only plastic ones made in some foreign country. J.B.
  17. J

    Loud Knock After Replacing Intake Manifold

    Get a mechanic's stethoscope and listen all over the engine when it is running, including the crank case and the pan. This will help tell you where the noise is coming from. Hope you didn't bend a rod. J.B.
  18. J

    Dieseling sometimes when hot

    800 RPM is too high, unless you have a pretty hot cam. Try slowing it down to about 500 RPM in Drive, (automatic), or 550 with a stick. J. B.
  19. J

    What motor is best for a swap on a K25

    If you are going to use it as is was intended to be used, you should put in a high torque motor, meaning a low RPM cam, as you need lots of low RPM torque, not high end horsepower. I would stay away from LT1, LS engines, and other Hi Po engines, as they are mainly RPM engines. Now if you just...
  20. J

    1985 K5 keeps breaking starters, help!

    Strange. My 292 is drilled for two different starter noses, one for staggered bolts, the other for inline bolts. I just wore out one with the inline bolts. J. B.
  21. J

    GMC Grill

    Now a GMC logo that could go on in place of the Chevy bowtie would work until a true GMC grille could be found. J.B.
  22. J

    GMC Grill

    Only place you can find them is at swap meets or on E-Bay. I found mine for a 73 - 75 last month on E-Bay. It cost well over $300.00, but it is in very good shape. J.B.
  23. J

    GMC Grill

    They think there is not enough demand to justify tooling up for them. What might be an acceptable alternative would be to make GMC logos that will bolt on in place of the Chevy bowtie. James
  24. J

    I’m interested in swapping out the TH350 for a 700R4

    He probably means the converter is trying to multiply torque, so the engine is revving higher than it would if he was on level ground. J. B.
  25. J

    10W-40 for Chevy 350

    Now they are telling people to use 5W 30 or even 5W 20. I for one refuse to. J. B.

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