Drack slicks for a 17x8?

So what is a good drag slick for a 17x8 rim? I currently have 17x8's on my 68 fastback which I use a 245/45/17 tire on the street. What would be a comparable size in a slick?

This is just a 320 horse 318, with a 3:55 sure grip. Car weighs 3240 with me in it and a half tank of fuel.

Maybe these?

http://www.summitracing.com/parts/mnh-mhr172
or

http://www.summitracing.com/parts/hoo-18157/overview/

Open to suggestions or advice. :)