Scat 9000 Series Small Block Chevy 383 CID Stroker cast steel crank, internal balanced 3.750″ stroke. Light weight at 51 lbs. Rod journal diameter 2.100″ mains 2.449″ diameter . 2-PC rear main seal, must use 6.000″ rod length , needs balanced before put in to service. Special order 3-5 business days. Please e-mail with questions.