87 454 tbi black smoke

[bigblockdually]

i'm pretty dam sure that my truck wants to be a diesel it has a slight engine knock that goes away when warmed up and it smokes BLACK if you tap the throttle quick and repeadtly it will smoke or if you just nail it from a stop and let off when you get to the floor it will run rough until you rev it up and hold it steadt i can get it smoking pretty dam bad sometimes to the point it looks like the truck is on fire if i just keep on tapping the throttle in gear it gets all caught up in itself and just smokes like hell so if anyone knows why its doing this it would help and you can also just romp the hell out of it burning out launching it or just reving it it wont do it