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I hope you guys and gals can help me. I am rebuilding a 72 cast crank 340 in a numbers matching car. It is a late 72 model so it has a cast crank as the 73s do. I want to earlier 340 pistons to regain the compression that is lost in the 72 and 73 models. Does anyone know the correct weight...

Hey yall give me alittle advice please. My headers are shot and I need new ones, help me chose. My car is a bracket only car, 408 stock heads 2.02 with home porting but not flow benched but I feel they work real well as I have ported a dozen or so sbm heads, flat top 11 to 1, steel crank, .568...

Hi, I hope someone will enlighten me alittle. I am restoring a 72 340 duster with the numbers matching motor. when I got the motor apart, I found it was a late 72 that had a cast external balance crank. The balancer stated 340 cast crank only on it. The crank number was 3462387. The torque...