Just wanted to know would a 6n2 boot fit on a 6n without any fitting issues?

and if so are there any offer parts like bonnets etc which are compatible with the 6n from 6n2

yes it fits straight on but……you need to weld on small plates to the quarter panels so that they all sit even as the tailgate sits quite far out compared to a 6n one

so yeah it will fit but you need to modify the quarter panels