I have the 275/50/15 BFG comp T/A drag radials on 15x8 inch rims and they are the best tire i have ever owned (other than my slicks). they poke out off the rim a little bit but driveability is awesome and they hook like crazy i ran consistant 1.7 60' times with them and i used to have a T5 and i would rev up to about 5 grand and dump the clutch and they wouldn't brake loose and that was also running a 8.10 which is a mid 12 second pass so if you don't care about having a tire that is a little bigger than the rim i suggest the BFG's.
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88LX 5.0,C4,3200stall,TFS stg 1 cam, ported E7's, BBK LT's, Race magnum bullets, ASP 3" pulley, 3.73's, 75hp NOS Dry Kit, Explorer intake
7.94@85 N/A 1/8th C4
7.61@89 N2O 1/8th T-5
http://www.angelfire.com/ns/PurgingPony/50mainpage.html