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  1. flathead31coupe

    440 popping through the exhaust...

    few weeks ago I started it. it was running good but when given a little gas it pop through the driverside header...then quit ran great... yesterday I started it same thing through on the pass side header, idles good but hold it steady at 1500 to 200 it pops periodically..its a mild build, duel...
  2. flathead31coupe

    to rebuild or just lower end 71 440

    I have a 71 440 that was build 20 yrs ago had low on start up, decided to go a different route...engine have been stored inside this whole time...took just the pan off and crank out seen it had a few hole in the crank that a few pices of thin rubber in them, and the bearing had some scratches...
  3. flathead31coupe

    a body rear end ? 8 3/4 vs dana 60

    wanting to know if the 8 3/4 weight difference vs the dana 60 dead weight on the axle to help with traction is worth one over the other.....
  4. flathead31coupe

    71 440 build ? grooved bearings mains and rods

    I know it has had to be covered here just cant find it... how do I know witch to use.. full 3/4 or 1/2 grooved bearings...the ones I took out were 1/2 grooved on the mains with a thrust flang dia of 3 9/16 = 3.5625 looking for the right bearings.... crank is 30/30...thanks
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