In MY mind the term orginal is as it came equiped....
tires- OE size options - orginal after mkt - modified
maint items - designed to fit the application- orginal enough
drum brakes original
disk brakes - modified
generator org, alt modified
Etc...Etc...
safety/roadablity/$$$$$/Personal choices determine our final product.
Bottom line unless you are looking to make a trailer queen there are going to be a few mods somewhere.
Its your truck...be like Burger King, have it your way.
Just my .02
Brad
