[Dauntless1971]

It sounded like a plus threaded rocker studs installed when I read the ad for this used 1964 326 engine I picked up. Best I can tell the studs do appear to be threaded just not with nut at the base. Though the seller kept the roller rockers, pushrods and polylocks for his new 455 engine. And as I look into getting replacement rockers it seems a whole new can of worms has been opened. I am sure there are more damaged guides on the other side. Is it possible now to just use stock stamped rockers? Or do I have to get the heads milled, new studs and use guide plates?