We've run Porterfields on out 240Z with good success. They have the fronts in staock for the 280zx in a variety of compounds: http://www.porterfield-brakes.com/search.php
We run the r-4 ourselves. The Carbotech pads seem to perform a little better, but at least for the 240z the R-4's are much less expensive. We ran 1 set of Hawk blues on the car and pulled them off after 3 sessions. We still keep them with our spares, but like the Porterfields bite and feel much better.
Chris Carey
Central Florida Region
ITS/Vintage Datsun 240Z
Favorite tool to remove undercoating---- A curb!
"Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car.
Horsepower is how fast you hit the wall, torque is how far you take the wall with you."
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