Widest wheel/tire combo for C25

[Eagle Kammback]

So I've been doing a lot of searching on the site, but I can't seem to find exactly what I'm looking for. I've got a 72 C25, with the original 16.5" wheels. I see that Wheel Vintiques sells a 10" wide wheel that would look at home here (Trying to maintain a sort of stock look) https://www.summitracing.com/parts/w...0805/overview/
Would running these at all 4 corners be overkill? I've always ran the widest wheels and tires that I could on my previous cars and love the stopping power I can get (Current setup locked up the Cooper Discoveries with almost no pressure today, not a fan of that).
Or would it be better to run the Econoline wheels with 275/75/16s at all four corners?
http://www.ebay.com/itm/New-16x7-Inc...1%26rkt%3D1%26

Anybody running a staggered setup with extra wide tires in the rear? Just curious as to how that would look and maybe do a combination of the two. Thanks!