pred. 212 or 196 clone

They are starting a powder puff class at the local track that my wife will run. The motor rules so far are: 6.5hp motor with aftermarket air filter and open header, remove the gov. and race. Stock other than that. Sounds like it leaves a lot of grey area to me. I already run the pro clone class and have a few setting around. Would the hemi pred. or the 196 clone be the better way to go? Thanks.