I have switched over to Hoosiers this year and they definitely need more air then my old M/T's, i am at 13psi and thinking i might get away with more, especially after what Vern says.
Mick

69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36