For me it was Hemi anythings...never got the chance to run higher Hp Mk. 1V power in A or F body Chevys but had LOTS of fun in Hemi Runners, Chargers etc...a '71 Cuda 440 V-code car too! .
Not Muscle cars so I know they don't count, but working for a dealer I was always impressed by a lot of Benz products too...had a few good runs in the rare 6.3 and 6.9 sedans also SL's of the day were always great fun especially when the variable valve timing models came out! .
If we start talking fast non-stock cars, bikes or sno-machines...whole different story! .
~ Pete