help with the fusible link wire smoking under the dash as i drive

You should use an OHM meter to check the wire. Connect it to both ends too see if the wire has too much resistence. Also as stated above check for corroided wires or connections.

I almost lost my '76 Suburban 454 last year because of similiar problem, (circuit brkr on fire wall) luckily I always have a fire ext. handy. I also just picked up a '67 Chevy because of an electrical fire.

You really should not drive until it is fixed.