Selecting a degree wheel for checking camshaft timing

["Dave Connitt" <dconnitt@fuse.net>]

Hello,
Does anyone have a suggestion for a degree wheel they bought to check cam
timing on a TR4A motor? There seem to be several on the internet and before
I just picked on out, I thought I would ask you guys first. Secondly, can
anyone tell me what the thread on the end of the crankshaft is? I am
thinking about purchasing a shorter bolt and nut to attach the degree wheel
to the front of the crankshaft.
Thanks,
Dave Connitt