1967 barracuda help

[440randy]

just joined this site and any help on my new to me ride would be a great help.Its a 1967 barracuda slant six .first I want to know how to cross reference the motor serial # to see if it was born with this engine matching numbers.it only has 62000 original miles.purchased off of the son of the orig owner.need trunk lid trim upper and lower. and headlight trim that covers the fender fronts.also would like to install the widest rally wheels you can get front and rear.can anybody let me know how wide I can go and where to buy over sized rims as I think for small bolt pattern 5and a half are the only stock ones .are good mark body panels a good product to use.thanks for any advice