I'm one of the co - organisers for Sepang Drag Battle, Class F [ On The Road ] webbie : http://malaysiangp.com.my/node/1/10. I'm trying to look for any tools that can help me to check the bore and maybe, just maybe, stroke size of a DOHC engine.

Prefer to have the tool to be used directly thru plug hole, without having to resort to open the valcover and remove the cams. I've checked Mr Gasket's cubic inch tester tool, sadly it requires the removal of the cams to use it effectively.

Prices doesn't matter, quality and accuracy of tool is very important though.