Ok youre on the money,BUT if you want to use the 4K lifters you will need to get them faced before you run them on this cam.
Yes you will need to remove the lifters so they don't fall in the sump.So take them out and to an engine reco shop and ask them to face them for you ,prolly cost $2 or $3 each maybe???.
I wouldnt bother with the degree thing as you have no way of changing it even if it is slightly out,just line it up dot to dot.
Its easy job mate,the hardest bit might be getting the lifters out past the head if the casting is too thick