When I did my 95" upgrade I Googled one up, printed it out and taped it to a piece of board that I cut to size and drilled a hole in. It worked pretty good for a basically free unit. I just wanted to check the cam timing for the heck of it, just to say I did. :beer:
wouldn't it be easier to just put clay in the valve pockets on the pistons and turn the motor over ?? This can be done in less than 30 minutes and is the most reliable method for checking the clearances on your valves to pistons.
Interesting thread, and I'm definitely no expert, but I like to learn also... So, I'm thinking with different valve sizes you'll need to take into account whether or not you'll need to replace or machine the seats, and how the valves will be sunk.
most cam sheets have the tdc numbers listed you can do it head off with a veneer if the springs are removed if you are using non stock rockers you will need to do some math to get the corrected numbers