The way i did it is you find the real TDC. The way to do it is to use the infamous screwdriver method to find TDC.
Then you install your degree wheel on the flywheel and put a piece of wire attach to the engine to 0 degree.
Next is to put the dial indicator in the plug hole. Not much of steel in that area for my magnetic base so i made a steel bracket that use the valve cover bolts to old steady. So you install your dial indicator so you have some pressure on the dial. Set to 0 and turn the crank clockwwise. When you read let's say .002, note the number on the degree Wheel. Continue turning and when you are .002 before the 0 you set, note the number on the degree Wheel. For example if you read 355 and 3. You have to move your pointer 1 degree up to 4 so the reading will be 356 and 4. Equal from the zero. From now the pointer or the degree wheel can't move. Retest to be shure. Now you have your true TDC.
Now you have to find the lobe center of the cam. For that you have to install the dial indicator 90 degrees from the valve tappet and clear the lobe rotation. The trick i found, sorry for the purist was to use electric tape and a piece of steel wire at the end of my dial indicator because my needle was to big to fit on the side of the cam and clearing the lobe. When there is full pressure to the tappet, you install your dial indicator whit some pressure on it. Set to 0 and turn the crank clockwise. when the valve start closing let's say .002, note the number on the degree Wheel. Continue turning and when the valve is .002 before the 0 you set, note the number on the degree Wheel. For example if you read 84 and 134, you take 134-84=50/2=25. So 25+84=109. Your lobe center is at 109 degree and you want 110. If you move to 85 you will read 135 also. So 135-85=50/2=25. So 85+25=110. So you set your degree wheel to 85 degree and using the adjustable pulley turn back the dial indicator to .002 when the crank is at 85 degree. Retest and you should read 85 and 135. Now your lobe center is at 110 degree.
Same thing for the other side.
That's the way i did it.
And i hope my England is not to bad.
Not Weld att Alls... 
