Upgrading to Stainless Steel Valves Question

[Onefast99gsx]

HI Guys- Well in regards to my other thread about re-ringing, i pulled the head off over the weekend. I think it's time to change the valves while the head is off due to the mileage and high rpms.

I might as well upgrade to Stainless valves. My local machine shop who mostly builds stock car engines said that changing the guides isn't necessary if the clearance is proper. He runs stainless valves and steel guides all the time in stock engines without issues. I read elsewhere that you should change to a bronze/manganese guide though because of the differences of heat expansions. He did say he would check the clearance for me.

So... do any of you run stainless valves with the stock valve guides. Is this ok to do?

Thanks.