Originally Posted by supershaft
+1! I am going to do it with my spare 336 and a short block if I can figure out a way to get a mid stroke derived TDC. I already have a couple of ideas. I have never had my own degree wheel! I think I am going to get a big one and not worry about timing them in the frame.
I use a spark plug with the centre electrode smashed out and a bit of rod welded in there. It's maybe 40mm long and although it's not getting positive stop right at mid stroke, it has proved accurate and repeatable, so I'm happy with it.