Another good or bad source for tools can be Ebay.

Personally, I would suggest used tools made in the USA.

Sears / Penske engine analyzers take care of the need for tach, dwell, and a host of other applications; and were excellent quality. Make sure the original book, as well as the leads/cables comes with the equipment.

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop