My 68's alternator came with an internal voltage regulator alternator when I got it last year. I since converted it to a big block and just put an ordinary alternator and external regulator, like original. There is the big red wire to the alternator along with a plug that houses two wires, a blue and a white I think. The wide plug for the original regulator was left unused in the corner of the rad support. When I plugged everything, the regulator became very hot and became smoking and my pertronix fried. What is wrong with my set-up ? Is there something modified in the wiring since it was running a internally regulated alternator ? Something that I should "undo" before plugging everything ? Also, my aftermarket regulator said the box should be grounded . Do they mean the "body" of the box ? I noticed there is an extra terminal under it that corresponds to another terminal which goes to the brown wire on the connector. Is this where the ground should connect ? Please help. Thanks.