Thread: 305 to 350

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It depends on the year. One piece units have a different flexplate and starter nose not to mention externally balanced. Match the starter and flexplate to the year of the motor and run with it. Exhaust and stuff will go good. If you're not sure how to identify, look at the rear crank flange. Smooth and round, one piece. Balancing flange outside the center of the flexplate/flywheel mount surface, two piece. Would be nice to have the Julian date off of the block. It could help us tell you which without being there to look at it.