That's pretty nice! I cut a 1.76 with street tires on a warm 70* evening in 1786 DA in the 1/8. so it can be done. Only mods I had at the time was the 93oct tune and a ported TB. The other day I took my car to get tuned by lxmodguy on a Mustang dyno and these were the results:
Lowest stock
Middle 93 cai
Top custom tune set at 12.3 w
minor tweaks
Tq 385 stock, 401 diablo, 415 custom
Hp 377 stock, 371 diablo, 394 custom
Numbers on a md250 mustang dyno
79 degrees 81
humidity
Engine mods: LMI True CAI and a ported TB done by Brian(lxmodguy)