This afternoon I installed a distributor I bought from Trailbeast a few months ago. I'll fire it up tonight to check/set the timing but the install was straightforward. Removed the old cap and rotor, then unplugged the connector and vacuum advance hose, removed the bolt/clamp and lifted the old one out. Lined up the new distributor blade to slide into the gear and dropped the new distributor in with the rotor pointing in the same direction as the old one (so it's not 180 out). Plugged everything back in and it's ready to set the timing now. The alignment of the blade relative to the rotor was the same on the one I bought from Trailbeast as my old one.