HELP! Coil Blew UP!!!

[chevys2die4]

Well I finally got to the point of my restoration that I could drive (move) my 68 project in and out of my shop and then...I came into the shop the next morning and found oil all over engine and floor. I then found the coil had blew the post out and the wire to the dist. was toast!
A little back ground 1968 shortbed C10 396 Auto., points dist. all new everything full restoration with all wiring etc. anyone ever had this or heard of this happen? No the key was not left on, Truck had been running for months before this. I have know installed a pertronix ignitor and mathing coil but have not tested or started it yet until I can get some feed back from the board? I don't want to fry it! My strong point is not electrical but I feel confidant wiring is correct and no shorts or grounding issues I can find? HELP?