what's next

hey folks, looking for suggestions.I have a 66 dart with built slant/6 were talkin bored .30 over decked an head shaved. oversized valves, custom cam most of the usual refinents. transmisson rebuild scheduled for spring. Will be going to the track this summer an running against a 05 mustang an 65 chevelle both v-8 cars. all our cars are street cars, would like to suprise these guys. Any suggestions?
:prayer: