Here's the most accurate way to measure cylinder taper, but unless you're building more than one engine, it might not be worth the cost. I've been using a shop full of precision tools for the past 50-something years, so sometimes I don't even think about the idea that not everybody is equipped that way!

www.ebay.com/itm/286564765887?

Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!