Originally Posted by MY99 2.5GT
272 sounds perfect for 8500+ redline. You will need shimless buckets or shim under buckets as well as stiffer valve springs and retainers. Some very good port and pollish work will be much need to run smoothly that high in the revs. I would have them rework the combustion chamber as well to smooth out some of the rough angles.
i will have stiffer valves springs and retainers to go along with the port and ppolish and 3 angle valve job. the combustion chambers are being honed and darton sleeved. would this work out with the stock cams to raise the redline safely or do they need to be modded to the 272's? where could i get 272's and are they usually really expensive thanks.