I'd like to go with larger wheels, but I'm not sure which wheel and tire size I can use front & Rear. :?

Search is your friend. This has been talked about a great deal. I run 225/60s on front & 245/60s in rear with no problems at all.

Here's a very informative article posted by ElkyPete: Offset and Backspacing made simple (http://www.elcaminocentral.com/article-60--0-0.html)

I HAVE A SET OF WHEELS AND TIRE THAT WILL FIX YOUR ELKY I HAVE A PICTURE OF THEM ON MY PHOTO ABLUM (ELKYGENERALLEE)