[big job]

For many recent years mfg. like seal power you get the same valve an exhaust valve.
later engines use rotators some have valve seats some do not. I do not know what
you are doing far as a valve job, but all kits are available. As gosfast said you don't
need rotators but thats your choice . I think, simply put what ever you take out just
replace with the same thing. Then lifters: adjustable lifters may look easy but watch
out cause of cheap china stuff now a days as well as valve guides total junk. So do it
right and only once use genuine parts they are out there.... sam