Alot of unknown info, yes, but it doesn't matter in this case. It is costing you $20 to call a $43 pot...with slick? SNAP CALL. The flop will decide the rest. At this point decide you can get creative or gear down. Depends much more on your confidence and skills. If his cards were face up and you could see aces you should still make this call. Anyone tells you different, start watching them more closely. They will be easy to read and soon you will be crushing THEM.
gl