One thing you do NOT want in my opinion is a radial tyre on the track with a stick even with the tamer, something like a Hoosier 10>10.5/28 or 29 if it will fit, thats what we use (10x29@17psi) and it dead hooks@4400-ish flash launch rpm. you'll turn around 6500 with a 28"/4.10's@700hp/3800lbs? and around 200rpm less with a 29" tyre and and in the 10.20's @130>131 and in the 9's with some juice of course.
Thank you so much for that detailed reply and advice!
I've already consigned myself that with the 572, the
track days of Drag Radials are over, and I have looked at some bias ply options.
I don't know when I can get the new AMD wheel tub replacements (vs the "strip of metal" kit from US Car Tools) to get some more room in the rear, and I want to get the trunk floorpan addressed at the same time. It had a thick coat of body putty on it the day I met Miss Victory at the Fast Lane dealership in St. Charles MO, and I pulled on the edge of the painted, cracked filler and a chunk came up. So "geographically" those areas are co-located enough that when the new, wider tubs are installed, it just makes sense to have the trunk floor taken care of as well. I plan on a chromoly steel roll cage, and I'm sure there will be a couple of fore-to-aft braces also in that area.
I'm likely to look for the widest drag radials (although I'm not ruling out bias ply 'street tires') with enough tread void in the pattern to keep me from being forced to park if I happen to get caught in the rain. My Toyo Proxes TQ drag radials have been OUTSTANDING in EVERY aspect of what is desired in a streetable drag radial, with the exception of a "shorter than desired for flex" sidewall. They look nice, but to have a shot at any kind of traction, they probably need more flex than they give.
I've been running these Toyo Proxes TQ 315/35/17 drag radials from the day I had the Year One aluminum Rallye wheels installed. 9" wide and 17" diameter wheel, with Toyo calling for an ideal wheel width of 11" and range of 10½-12½". The first thing I looked at was any sidewall bulge or concerns from my "cheating" with only a 9" width, but they look and run fine. I'm going to order the widest tire Toyo offers in that lineup, a the next size up from the ones I've been using, a 345/40/17 to see how they look on the same 9" wide rear wheel, and see if they fit in the wheelwell or leaf spring for clearance. 5" backspace is how the rear wheels come, and the ones I've had for at least 4 years clear everything with NEVER a rub.
BUT
If the 345/40/17 has
no possibility of hooking on the street with the 572, but
some kind of tire (preferably with decent tread void area) does have the ability to hook, on the street, my whole playbook gets rewritten and that means 4 new wheels and at least 2 new tires for street use.
For the track, I'm likely to see about a matching pair of rear wheels (but not a big deal-they are likely going to be 'track ONLY') with slicks, no compromise to traction, strictly business.
Any advice from those who know or have/are "there" I'm hoping for suggestions.
Look at this tread pattern and the specs, let me know if there's no real chance of these hooking:
What I have now:
I really like this look, if I have to go with something wider, and smaller diameter wheels are likely as well:
And I really like these too:
, it has to have manners cruising the highway etc. at low rpm with a 5spd hence the good choice I believe with the smaller heads and a small duration cam..... to keep velocity up and not blow the gas out the tailpipes with a ton of overlap (not my words, AndyF's from a post on Moparts on this subject). Most build a race orientated motor and use it on the street, we all put up with this in the past with comp and big cams/gears etc....this is the other way around much like my mates '69RR Sox & Martin tribute car that sees the strip 3>4 times a year only, and yes it does have big heads but that was not his choice.
me over that issue but not as badly as
would be LOL. 
