To the person who guesses how many rockers or rocker arms i will need
Don't know myself yet as i just got in from work at 10.30pm to find "hi Nigel its Alf i've found a bit of wear on your rocker arms give me a ring so we can work out were we can go from here " on my answer phone
Try to get some second hand heads that can be stripped for spares if it's that bad for you. It's what I did ( although I got the heads in advance, just in case)..