Who is useing Header extensions?

I have 28x9x15 slicks. I am wanting to switch to a radial pro tire. Sense the class I was wanting race in is no more.i might step up to a 315 tire..I was wanting to do some street driving next year..But you never know with me.lol
Converter could be too loose but I think u could use a taller tire. I have used extensions on a couple cars/engine combo’ sand each time the 60 ft was improved. Kim