I have a good article that is too big to attach. It may help. email me and I will send it to you. mike.linbeck@eimc.com
There are a pretty wide variety of choices, as you have all of the ones available for the Rover motors, plus a few still available for the 215 (mostly low compression last time I checked) It shouldn't be hard to work out a good compression ratio given the chamber size of your heads though, even with the 215 pistons. JB
