rebuild 1.88 J heads or 2.02 J heads?

when you have a valve job done it sinks the valve into the head and you lose a bit of flow. that being said installing 2.02's in the 1.88 head will be like have a brand new head as for as flow goes. for 180 bucks you might be able to buy the valves and get the valve job done for a tad more.