Marcos Maniacs

I have a chance to get a set of replica "Mini-Lite" knock-off wheels at a decent price.

The question is if they will have a usable back-space and width?
I do not want them to rub, and absolutely will not flare the wheel arches.

My car came with Mini-Lite 13" true mag wheels.
High performance tire selection seems limited for 13", and going to spline hubs cures an 
issue with differing bolt patterns with the Alfa-Romeo axle I plan to fit.

Not sure what the Max. diameter is for tires to fit, with that I can see about 14" Dia. tire 
possibilities.

Any informed advice much appreciated!