[RKDinOKC]

I don't understand why a bone stock 951 with only the K26-6 turbo would be losing head gaskets like you described!?!

I hope the Koni's are the yellows with adjustable ride height and rebound adjustment? You will be able to spend more time driving than fixing.

If it were me...

First make sure all the motor bits are in proper running order ie., reliability.

Then spend money on the suspension. 180-410 Progressive Front and 30 or 31mm rear torsion bars. And Weltmeister adjustable sway bars front and rear. Not the sway bars with holes, but the ones with the sliding collars. This is less spring than most use for track but really all that is necessary and you don't have to worry about the rear breaking because the mounts weren't really designed to carry the weight of the car on the helper springs.

I started with the turboS so there where some advantages like bigger brakes and and the cam, external oil cooler, and turbo for 250 hp instead of 230 AND the LSD rear diff.

After the suspension and possibly larger brakes (if you have a problem with brake fade). Then I would look at reliable hp upgrades.