I just ordered one of these. $75. on the ebay

http://www.aliexpress.com/store/pro...otive-electrical/1364096_1980863169.html

Looking forward to seeing it work on the old engine.
I like the feature of it having USB to my laptop for recording ignition values and displaying graphs.

While it will connect up to both distributor it has spark wire clamp for monitoring plug conditions.

But my real excitement will be setting it up to be able to add to the three distributor testers I have for hopefully recording advance curves both mechanical and vacuum and verifying smooth operation after rebuild/refresh.

With this the old 1940's ALLEN distributor tester needing restored will have some serious useful ability to it.

Should be good for truck and for shop.

Baking in the nice desert sun, breathing life back into a 48 3800 5 window.