Sounds like a fun project.
1. Tap the existing holes for 5/16 bolts. You need not drill them.
2. Aluminum is best. I would get both gears in a set on an engine this old. I'm not sure how well gears of different makes work.
3. There are two styles of 270 pistons. The older style in domed and that sounds like what you have. I have as set of Vinolas with the sticky up thing on them. Those should be removed. I have no idea why they are left on. I think some were let out that were not completed as mine ar rough on top too. The newer style piston is for the later 270 head with a D shaped chamber and are flat tops.
4. A 1/2" hole drilled and tapped in the crank snout is handy. The thrust bearing can be damaged if you drive the dampener on. That said I have done it. It's hard to heat it if it has a rubber ring. Otherwise heating the dampener hakes it easier if you don't burn yourself in the process.
Good luck and keep us up on your progress.
Last edited by Beater of the Pack; 09/25/18 02:53 AM.
