What is the highest amp rating alternator I can use on a 1970 Dart

340 , electronic ignition , all stock wiring in good shape . Has the rallye gauges , all gauges were redone . Right now it has a 40 or 45 amp alternator . Can I run the 60 amp single pulley safely ? http://www.northernautoparts.com/ProductModelDetail.cfm?InventoryId=1213599
Had a problem years ago on my ramcharger 1977 when they put a 100 amp alternator on it . , started smoking behind the dash , don't want that happening again .
Thanks .