Join Date: Feb 2002
Location: N.W. Washington
the clay trick does work well, but IMO, the best way to do it is with a light spring, installed in place of your valve spring and a dial indicator on the retainer. this gives you real accurate readings of v to p which is really important if they are going to be close. the clay is good for a rough estimate, it's been done that way for years, but if you want to know for sure and are running close, use a light spring and a dial indicator. also, as eric said, leave the gasket out and just figure that in to the equation, using its compressed thickness. good luck! edit; after re-reading your post, i'd be very surprised, even amazed, if you don't have a ton of clearance w/ that cam, so clay will probably do, but then again, it's good to learn how to do it the most accurate way.
[This message has been edited by 68rs406 (edited 11-17-2002).]