f*** Florida. I hate that its 'home.' My home town is even worse than usual Florida.
In regards to timing guns, this is my favorite one:
http://www.amazon.com/INNOVA-5568-Pro-T ... 8398824383

They make fancier units, but this will do. The best thing about it is the simple clamp on lead and spark advance function. Also does dwell, but I don't know how to use that function. Clamp onto the #1 spark plug wire and you're good to go! It reads super well, but my absolute favorite part is that it displays the tachometer to the nearest 50rpms. SUPER freggin nifty if you're adjusting timing and don't have to go and check the idle in the car. All of the leads are super long (and replaceable if you snag them in the accessory belt or something), the display is lit (use in the dark), and the "barrel" adjusts so it makes it really easy to set somewhere while you turn the distributor or CAS. It will never disappoint. I've had mine for years- a very worthwhile investment over the standard unit on the market.
EDIT: saw that he is using MSD units after the fact. Some guys in the reviews say it doesn't work for MSD, but I had no problems with my T/A running an MSD6A box and this light. But, if you're concerned, go back to basics with a simple light.