First autoX and need some advice

[track370]

Hey guys,
Finally had my first scca autoX with my Z this weekend. Had a blast and can't wait for the next. I have a base z with sport pack, other than that my Z is completely stock and ran on stock tires also. A noticed a bit of understeer on the stock tires. Now i'm debatign what I should turn to for my first mods.

What would you guys suggest for these things:

1) Set of track rims and slicks (budget minded so whats the best bang for your buck)? Maybe a set of rims that I could also double up as winter rims?
2) A set of track anti sways? Typically do you track guys run front and rears? I guess this might be very tire type and setup dependent, or is the car always biased towards one side?
3) Brakes seemed fine, but I see numerous posts about upgrading pads asap if you start autoX or tracking.
4) Oil cooler suggestions. Even with my short 40 second runs, I got the oil up to 250. I know Zs have an issue with this, but isn't this a bit ridiculous. Even when i'm cruising on the highway @65 on a 90 degree day, oil temp sits at 220, this is normal?

Hope to hear your opinions and suggestions. Thanks

-Matt