I have 8900 original miles. Adding mods to get hopefully close to 400 WHP, so am going to replace clutch. Stock clutch is fine and has not been slipping/chattering. Do I still need to resurface?

 

A new clutch will probably bite better on a freshly machined surface. However, if the flywheel is flat (you need a real machinist's straight edge and a feeler gauge to know) and doesn't show any work hardened hot spots it should be fine. Probably with the miles you have 99 out a hundred will be okay.

 

I would leave well alone until required:
I am on my stock clutch at 400whp on MD dyno at FFTec, drives beautifully including track days.

If you are into drag racing, than it likely won't be adequate for dumping clutch at 5500rpm

 

I kind of new the answer before I asked. Problem is, even 10 years ago I knew 3 locally competent mom and pop auto parts with good machine shops. They all closed, leaving me feeling like a lightly used factory surface could be better than the hacks that are left, that I could get to machine this.

I guess my real question should be who could competently do a flywheel in central NJ?

It will see the track for 5 or 10 passes until I think I have a new best. Then probably never again, but might be launched once in a blue moon on the street.
I'll have it torn down doing cams, turbo, IC, and maybe even head studs, so a clutch @ that point would be a lot easier.

 

I have seen factory clutches die from a hand full of launches in less then 12k. If you plan on drag racing even a little bit I would recommend an act 2100 with a street disk.

 

If your putting in a different/new clutch I would always have the surface machined and checked. Saves you the what if and for the cost its totally worth it. Wouldn't want a problem with your brand new clutch and have to do everything all over when all you had to do was have it machined for 50 bucks. I take my flywheels to the local napa and haven't had any problems.