Congratulations , you got a great car!
I like HP 580 and PDQ ZL1 , Toms Toy doesnt make too much sense to a random motorist because they dont know your name is tom.
A few more suggestions:
ZL1 POWR , POWR ZL1
KO BOSS , BOSS KO (referring to mustang boss)
TRK BST , (Track Beast or something to that effect )
Ill post more as I think of them
