In my case I need 3 1/2" deep in the
rear in order to cover the full floating 10.25" axles.
Where in the front I need shallow caps with center holes so I can lock the front 4x4 hubs.
(These are 16" rims) but I don't know if my type 3 wheel covers are the same diameter in 100-150's with 15" rims.
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.