Need opinions on these wheels for my '84 SWB

[Roadrage]

I am debating getting these wheels for my truck in a 20x8.5. I put my 22's on from my Tahoe but they rub in the front so I figured 20's would be good enough. Any thoughts on backspacing. I would like to go same size on front and rear to make it easy to rotate them. Also I have 3/4" spacers for the rears to even the wheelbase out. Thanks in advance for any comments.

Cant get links to show up so here is my Cardomain site.

http://www.cardomain.com/ride/3012557

And here is link to the wheel (I'm thinking grey centers)
http://www.coyswheel.com/coys.html