Well........that was interesting

No tubes, yes, radial on the front. I've mixed them on the street and never had any issues. It's just the nature of a slick.

guy above made a good point.
running tubes in those tires will definitely stiffen up the tire and make it less Wobbly.
I ran QTP’s on my W5 deal, initially without, on an 8 inch wheel, creepy on the big end on a 9 sec pass with super stock springs.
went to 10 inch wheel, nice improvement regards stability.
then went to tubes, another notable improvement/ difference.
Sidewalls good bit stiffer. I was on a 28 by 11.5( 28 by 10 measured) basically they are a bias slick