HRE wheels on a 64

[coffinator]

I was wondering what you think of these wheels on a 64 beetle. They come in sizes from 18-20 inch in diameter and from 7.5- 13 inches wide with ANY backspacing. I was thinking 18x8 in the front with a narrowed beam and 18x10 in the rear with 1.5 inch wider fenders. What backspacing should I use on both??


http://hrewheels.com/wheels/series.asp?series=540R

Thanks for the help,
mike