340 questions

i picked the motor up tonight. as longs as i measured right its std bore. the rods with no pistons are the original rods. the pistons and rods the seller got from a friend. steel crank drilled for a pilot bearing.. got a windage tray, oil pan and timing cover with it. now i just have have to figure out how to build it. want it to run like a 340 is supposed to and be a nice cruiser with the 3.23 gears that are in the car. I'll use the 340 manifolds i have on the car now along with the performer rpm (non air gap) intake i have. I'll also use one of the sets of J heads i have.

casting date looks to be 1-13-71 or maybe 1-15-71. not sure what the vin is from.

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That engine is from a 72 model year car from the VIN on it, but there's nothing wrong with that...

I would get new rod bolts and have them installed on the rods and remachine the crank bores so they are properly matched.... Rod bolts should only be torqued 5 times before replacing them so they don't get overstretched and break on you under stress... You don't know how many times those have been tightened and retorqued.. They have at least two torque cycles right from the engine factory and you don't know if anyone has tightened them afterwards...

Then find a nice set of 9.0 - 9.5 compression pistons...