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    Is it oil or antifreeze?

    I just noticed this thread. The white buildup is probably oil. I doubt that it is from the valve guides. It is most likely from worn or stuck piston rings.
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    Engine using excessive oil "opinions wanted"

    I never understood the thinking behind MMO in the fuel tank to help with rings ?? Its just going to get burned during combustion and in my opinion just make matters worse. We used to use the GM Top engine cleaner back when it was still potent. I would take all the plugs out, pour about a cup...
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    Cam Break In - Tips for Avoiding Wiped Lobes?

    Which valve springs are you using ?
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    1987 GMC V2500 TBI 350/TH400 Thermostat Help!

    Matt, If you go to the parts store and give them the vin or tell them what you are working on they should be able to give you the correct thermostat. As far as that goes the Chevy dealer probably will not be much more expensive and will be an oem part. I prefer using GM parts as much as...
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    Carbureted 305 to 350 with swap with knock sensor

    I did the same basic swap in my 85 K-5 Blazer years ago. The engine I built was a later model hydraulic roller cam with about 9.5 to 1 compression. I used everything of the 305 including the carb and I never felt it was not running properly. Had all the power I needed or wanted. I put at...
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    Any tips for replacing the heater hose quick disconnect?

    I replaced the one in my 99 with the factory part. The new ones are a different material. A lot of times it is just the o-ring leaking and you dont have to replace the whole fitting. They do tend to break and can be a pain to get the remains out of the aluminum intake. I have had to cut them...
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    which head to use.

    Just curious . . . where are they cracked ?
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    Rebuilt $350 long block questions

    My main concern was that they gave you a quote and then the final bill was substantially more. Without having seen the block its hard to say why it needed two sleeves. But ..... I have seen plenty of standard bore engines that were left sitting with water in a couple of cylinders and ended up...
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    BBC engine ID

    I would guess somewhere in the 80's at least. They did not start putting the Liter size (7.4) on the blocks till at least then. I cant tell the letters at the start of the stamped engine code for sure but if you can figure them out this site will tell you what you have...
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    Mechanical or Electric Fuel Pump.... Thoughts?

    If you are having to hold it to the floor to get it to start that sounds more like it is flooding. Too much fuel. If it really is no fuel in the bowl try cranking it for about ten seconds, then pump the gas twice and try again. It should start up. My 84 S-10 is carbureted and it will...
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    Mechanical or Electric Fuel Pump.... Thoughts?

    Unless you have a crazy engine there really is no need for an electric pump or a regulator. Just one more thing to go wrong. When I had my 85 K-5 Blazer I pulled the 305 out and built a pretty nice 355 for it. I used the same pump and Q-jet that were on the 305 and never had a single issue...
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    SBC valve lash?

    The only solid lifter 283 specs I could find were for early Corvettes. They were adjusted hot at .012 intake and .018 exhaust. Are you absolutely certain it is a solid lifter cam ??
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    Can I use my stock 454 intake???

    I am not sure what carb if any will bolt to the intake. Only way to find out is to pull the TBI and look. As far as the fuel pump goes you will have to use a pump with lower pressure for the carburetor. Make sure that your engine block actually has a place for the fuel pump to bolt on, that...
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    Fast idle after engine is warm..can someone give advice plz

    It sounds like the choke is not working properly. There is a black wire that goes to the choke heater (round black part) on the side of the carburetor. Unplug it from the choke heater and check to make sure the connector is not corroded. Clean it real good and put it back on and see what...
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    Broke another flexplate, what am I missing?

    Is the flex plate "bowed" or is that just the picture angle making it look that way ?
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    Broke another flexplate, what am I missing?

    In your first picture it looks like the flexplate is "bowed" forward ? Like the converter had been pushing on it real hard if it could. Have you checked to make sure that the crankshaft does not have too much end play ? You really should not be able to move the crankshaft back and forth any...
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    402 Experts... Tell me what you know

    Yes but he said he wanted "a good smooth torquey" engine for a truck. A true 400HP 402 is not going to be that. I still say he is better off spending the money on the engine he has now. A set of heads and a cam will get him to 400HP pretty easily and he will still have a smooth running...
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    402 Experts... Tell me what you know

    99% of them were 2 bolt mains.
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    402 Experts... Tell me what you know

    I would stick with the 454 that you have. A little bit of camshaft and maybe some work on the heads or a different set of heads and you should be able to easily get 400 HP. With the smaller 402 you will need to build a much more aggressive engine to reach the same goal. I would imagine you...
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