Aw man, I thought the tire size was based on your competing class, not your base class

Oh well... in that case you're right it pushes me to +40 points
The reason I thought of just taking the engine mod points rather than getting a new base class based on dyno/weight, was because I read from one of the guys on the NASA forums that if you dyno/weigh close to or at the minimum adjusted weight/hp, you will most likely get a TTD** which would leave me 5 points for suspension and no tire.
It's definitely worth looking into though, since at this point I have no idea what the cutoff numbers are for dyno classing into TTD, TTD*, or TTD**. But if I can hit close to the minimum weight/hp with just a wastegate mod, IC, and exhuast (+8 engine points), then I might be better off. But, I'm just theorizing at this point.
Thanks for the feedback. I'll take a look at some 235 tire setups. Do you think 225f/235r would be hard to handle from an oversteering standpoint?