The rim clearance is usually just 15” that have a problem. 16” with 0 offset rarely have a problem.

The rear transmission cross member discussion is also often mentioned as a concern. Many of the trucks it’s already missing.
Several posts on the merits of the crossmember. Depends on type of trans. Some shop manuals even mention some models did not have the rear member.

Some kits mention the engine cross member needs to modified for master cylinder clearance. Others make no mention. Master clearance might be tight with an automatic transmission conversion.