Quote: What rings would be the best for a 280 grit hone. this is a street strip with some nitrous 150hp plate

Tell me what ya mean? Are ya doing the backyard hone deal?

Here are some links:

http://www.hastingsmfg.com/Service%20Tips/ring_set_composition_recommendat.htm

http://members.aol.com/carleyware/library/ar293.htm

This is from another web site:
Once you have the pistons, you must measure them and add the recommended clearance to know what the final bore size will actually be. Most pistons will be measured on the skirts level with and 90��of the wrist pins bores, but always check the manufactures recommendations. Always used a torque plate to assure roundness of the bores when the head is torqued in place. The final honing grit will depend on the type of rings used. A Chrome or Stainless-steel ring will require 280 grit stones and the more popular Molybdenum (moly) rings will need much finer 400 grit stones. As near the final bore size, make sure you use plenty of honing fluid and minimum cutting pressure. If you are having this operation done, you can check the machinists work using a shim feeler gauge of the desired piston-to-wall clearance. the piston should slide snugly by the feeler gauge (make sure you put the feeler gauge in the same area that the piston is measured. Now used a feeler gauge 0.001" thicker, the piston should not fit through the bore with the gauge in place. Be very carefull doing this check, it is very easy to damage the piston skirts.
http://www.grapeaperacing.com/GrapeApeRacing/tech/blockprep.cfm

I read elsewhere the they don't have differnt stones anymore and that finish is the same for all rings?

I didn't see a post to your Q so I just added something to think about while waiting.

Les

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http://www.geocities.com/wildfire1mustang/

Ouch that hurt. Hey I race my car.

No worries.

Les