bob in CT wrote:Make sure you check the clearance of the piston to the head. You are going from flat tops to pop ups and shaving the head. Some have had to pull the head later to deal with the piston hitting the head so better safe than sorry. A little modeling clay on the piston helps to see what is happening and don't forget the gasket. It is nice to have an old one around for clearance checking.
This is the problem Bob is referring to:
both photos from/by Rick Prentice
Hope this helps.