[VintageLambo] More Jalpa/MSD

I hope I am not outside the rules with the following on my Jalpa. I did mention my Espada? I did also post it on the LamboList. Question #3 is what has me perplexed??? I have some questions about the MSD/Jalpa situation. I may show some lack of `smarts" in asking the following questions but so be it. 1-I have read all the messages I could find on the subject. I decided to start by installing the MSD Blaster 2 coil. My local Phoenix speed shop had the #8207 but it is not cylindrical so I chose the 8202 which looks physically too directly replace the original Bosch unit. Am I loosing anything here? 2-The info I have says the Bosch coil A terminal is blue/yellow (positive) and B terminal black/white (negative). My Jalpa has the exact opposite colors on the A and B terminals. What is what? 3-Thinking I could answer the above by checking for a positive 12 volts on the Bosch coil with my tester I got a zero reading on both terminals with the car running or just the ignition on. To make sure I was thinking and doing it right I checked on my Espada (with MSD) and got 12 volts on the coil + terminal. How could there not be power to the coil on the Jalpa but the engine operates? 4-I understand that the Perma-Tune equivalent of the MSD unit is a plug in replacement for the Bosch box. I sent them an email last night and the say they don"t have a dealer in Phoenix, don"t sell direct but will sell to my shop. I am the shop on this?