I did lose all the lights, front and back since those were the two fuses that burned. I think they were from a Harbor Freight kit, so that might have something to do with it. I did the mod a while ago, so not sure why now.
I ordered a new block for my 87 yesterday so timing was right, I will rewire using more fuses this time. I got everything to work last night moving the wires to unused fuse links.
I will be looking for another "cause" if there is one... You would think the fuse would just go and be done with it...