Dwell and Tachometer

In the TM9-2320-218-20-1-1, page 3-63 there is an illustration for a Simpson TDS-2. I found a TDS-3 and was wondering if anyone knew the difference between the two models. Can I use this newer model on a mutt?

I have one but I not sure what model it is, will look when I get home. I would think any tach/dwell would work as as long as the voltage is correct.

I won't matter...wonder how many people even know what tach and dwell are I haven't used that term in a very long time!

M151 Timing light and timing mark

Any timing light will work. I have a cheapo one from the local NAPA store. Only thing you need to do is hook it up to 12Volts instead of the 24 on the MUTT (hook it across one of the two batteries or use a seperate battery) You will also need to have an adapter for the number one cylinder plug wire or strip the ground brade off of and old plug wire and use that. While we are on the topic. I always have a hard time finding the timing mark on the pulley. Can anyone enlighthen me as to what it looks like and whether it is on the front or back of the pulley. (A photo would be great)