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  1. M

    340 problems

    I have a 71 340 demon, 4spd, 3:91 ... it has a mild cam , X heads, I don't know what the cam size is , its not stock, on start up , it will idle with choke set , when the choke is off , it dies until warm after you feather the fuel, ... then when you get on the road and go from first to second...
  2. M

    340 problems

    i have a 340 in a 71 duster , I just timed it and after it warms up a bit as your driving it and when you go from first to second gear it dies , but starts back , , it may do this once or twice then its ok, is it a carb problem or does it need more timing , any thoughts ,it has a larger cam but...
  3. M

    best type of oil for 71 340 engine

    The reason I'm question oil viscosity , about ever 2 yrs I strip the engine down of all of it's accessories , hoses, wiring , radiator , etc and do a repaint and cleaning of the engine for car show season , I've noticed that there is a slight seepage of oil from were the heads meet the block ...
  4. M

    best type of oil for 71 340 engine

    Why a diesel oil because of zinc content ?
  5. M

    best type of oil for 71 340 engine

    I live in Kentucky , during the summer months it can get to 90 degree plus , but it stays in to mid to high 80s , I only drive the car in the spring and summer mnths only to cruises and shows ... I didn't rebuild the motor and Im unaware of the specs ... So I'm looking for the best combination...
  6. M

    best type of oil for 71 340 engine

    The motor was rebuilt about 4 years ago, has appox. 10,000 on it , slightly heavy cam , been running 10-40 in it
  7. M

    best type of oil for 71 340 engine

    whats the the best type and grade of oil for a 340 small block , 20W50, 10W40 etc. thanks kevin
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