Mick ,
you will have to go here for similar size -
http://www.mickeythompsontires.com/strip.php?item=ETDragRadial
Here for Pro bracket radials -
http://www.mickeythompsontires.com/strip.php?item=BracketRadial
Hoosier -
https://www.hoosiertire.com/Drtire.htm
I don't think Hoosier will have your size

But remember your rag slicks grow and the radials don't , so gearing/trap rpm will be different . Suspension will also need adjustment .
I run a 275 Hoosier , never run a rag slick

Tex


New best ET 10.259@129.65 .
New best MPH 130.32
Finally fitted a solid cam,
stepped it up a bit more
3690lbs through the mufflers
New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm
Power by Tex's Automotive