Stroking the crankshaft to the highest 81mm will retain the RPM capacity intact. Bores can be brought out to 83mm, but consider to help keep it beneath 82.5mm. There is not any need for the Formulation Atlantic crankshaft. Reject blocks that may need to have 83mm to clean up, obviously https://raymondrssqo.iyublog.com/26498375/the-definitive-guide-to-4age-20v-for-sale