Best tires for racing?

I race in a class in Delaware, Ontario.  I use a 1980 Monte Carlo.  Everything is basically stock but we car allowed spring upgrades and motor mods.  My question is, what tire would be best for the class I run in.  We run 250 lap races on a 1/2 mile.  We can run anywhere from 215/70/15's to 235/70/15's....which I use.  I've used Firestone Indy 500's but I keep blistering them really bad.  What do you other races recommend?
Thanks  

I USED TO USE GOODYEAR EAGLE GT WHEN I HAD TO USE A DOT TIRE.FIRESTONES ARE JUNK  

Go to www.tirerack.com. You can compare tires based on many different varibles. Very good prices as well. Can you do our organization a favor? Please open this link http://www.myhometownhelper.com/ViewProject.aspx?tell=2&id=39225 and post a comment about Racers Against Child endangerment Inc. (R.A.C.E.) Your comments of support are necessary for the receipt of a $15000 grant. Forward this e-mail to every one you know. Please help. Any questions about R.A.C.E. can be answered from the web site www.race4life.us. our contact information is on the web site also.  

Wow!  250 laps on a 1/2 mile, I gotta go there!  I'll assume the track is dirt and you need to run DOT tires.  You need a harder compound tire.  The UTQA numbers can provide you with a rough guide.  The higher the wear number, the harder the compound.  Stay with tires that have a temp rating of "A".  The Firehawk Indy 500 has a treadwear rating of 500, which is pretty high, but it has a temp rating of "B", which makes it unsuitable for racing.  While there are many exceptions, this method will get you to a tire solution a lot quicker and cheaper than trial and error.  Find out what tires are survivng races at your track and pick a candidate with an "A" temp rating.  Then get a higher or lower treadwear rating based on your experience with that tire.  There's about 2 dozen other things to consider, but this will get you in the right direction.  

rpkulik:
Wow!  250 laps on a 1/2 mile, I gotta go there!  I'll assume the track is dirt and you need to run DOT tires.  You need a harder compound tire.  The UTQA numbers can provide you with a rough guide.  The higher the wear number, the harder the compound.  Stay with tires that have a temp rating of "A".  The Firehawk Indy 500 has a treadwear rating of 500, which is pretty high, but it has a temp rating of "B", which makes it unsuitable for racing.  While there are many exceptions, this method will get you to a tire solution a lot quicker and cheaper than trial and error.  Find out what tires are survivng races at your track and pick a candidate with an "A" temp rating.  Then get a higher or lower treadwear rating based on your experience with that tire.  There's about 2 dozen other things to consider, but this will get you in the right direction.

Will A tire Blister On A dirt Track?  

i would try a dood year rsa it has a tread wear rating of 200 with temp a and traction a it is what we run on our pure stocks on a 1/4 mile ashpalt track and i run on the same set of tires for multiple yrs with no probs