Ok, i just got back from my buddy's house. He has a set of 14 inch Cragar S/S rims and center caps for $200

They are 14 inches tall, 7 inches wide and the chrome on them is perfect. The bolt pattern is chevy 5 lug.

Here's my problem: Will 7 inch wide rims fit under my '72 elky? Would 14 inch rims be too small considering that the elky came factory with 15's? I really hope this works because i've been trying for a nice set of cragars for 2 years now. Buying them new is just way too expensive. Also if these rims would work on my elky, how wide of a tire can i put on them? What about how skinny of a tire? I would really like to put thinner tires on the front than on the back?