Should I have it decked??

[DanM]

When I take my block in for work (bore/hone, plugs, cam bearings, etc.), I'm wondering whether I should have it decked for flatness or not?

My mechanic said that lots of people opt not to have it decked and get away with it just fine. He said that a cast iron block like this generally doesn't go anywhere (in terms of warpage).

My other thought was that, when I get my rotating assembly all done, I'll test fit it, and I may or may not need to have more material shaved off the block to achieve the compression I want (probably mid 9s), depending how everything sits. In that case, it would be silly to have it decked now, then find out I have to take it back in to have another 30 thou shaved off once I test fit it all....

So should I hold off on milling the block for now, until I can test fit everything, and go from there?? Or is there a 99% chance I'll have to have it done anyway, in which case I may as well just do it now....?

Thanks
Dan