You're best bet would be in the FFW Trophy Stock, NMRA Pure Street or the NMCA EFI 13 classes. For either FFW or NMRA, you're going to have to lose the the rocker/cam combination since both are limited to .500" lift. You could go with 1.60 rockers and be legal. But the 1.70's with most of todays off-the-shelf cams will put you over the .500" max lift. EFI 13 is a 'run what you brung' class so you can fit there even if you add the n2o. But with n2o you'd probably have to move to the EFI 12 class. Be sure that if you plan on running the FFW events that your drag radials meet the 9.5" maximum width; NMRA allows up to 10.5 (I think).
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Jeff Chambers
T/S #4
12.40 Seconds/109.5 MPH
http://www.kellnet.com/chambers/default.htm