ok answer me this

replaced the old coil with a blaster 3 that will match the 7 msd installed new coil cleaned the point's on the rec in dis.rusty older dis got great spark started ran great fast forward a month or so sun came out tried to start no spark had worked under dash on radio can't see that having anything to do with spark?
would cold temp's effect coil the battery was full charge any idea
idea's newbee here

I have no dammed idea what you tried to say, here

You are using an MSD 7 box? is that right?

With a breaker point???? distributor????

Go to the MSD site. Download the destructions. There are troubleshooting tips right in "the book"