Possible cam install
Have the shop cut the top of the valve guides down and go to a smaller valve seal.
Now you wont have a problem with the guides hitting the retainers and in the future and you will be able to run this set of heads on a combination that has a bigger camshaft \\\\ higher lift.
USE THE PERFECT CIRCLE POSITIVE VALVE SEALS.
THEY ARE WHITE WITH A METAL BAND.
THE BAND SECURES THEM TOO THE VALVE GUIDE.
THE MACHINE SHOP WILL MAKE THE TOP OF THE GUIDE SMALLER SO THEY FIT.
good luck :thumrigh: