yeah keep it all in sync. a plastic tray with 16 holes is handy, then you can keep collets, spring seats, caps and springs all together for respective valve number. call inlet valve next to the cambelt end #1 then work along, exhaust valve next to cambelt end being #9 etc. relap the valves too, i expect the exhaust valves will be pitted, like little black carbon spots. I had a couple of valves that appeared to be not seating properely, could see soot up the edge of the seat. lapping valves, which although boring, is an easy way to regain lost power. Its easy to see wether youve done it correctly/enough too, cause the mating edges go satin silver, so any bits not contacting or still pitted will remain shiny.