Need Help For Change over to slicks for the track

My car went through the traps at 5800-6000 with Hoosier 26/9 X 15 slicks and a 3.91 SG rear. Car ran 13.0's @ 105 mph (73 dart sport 340/727 3500 stall).

I ran those slicks for two seasons (like 300 runs) with Kuhmo 195/75 R 14 front tires, never had any issues with mixing radials and bias ply tires.

Bob