months, you mean years....
how are you gonna sort the valve clearance, if you get the cams reprofiled ?Im really just trying to get to the camshafts ..... Pipercams said they'd do a reprofiling job for me if I sent them in but I know the timing chain will need to be at least partially removed to get the cams out
the billet ones maybe yeh, the reprofiled cams need custom buckets or shims thoThey already do performance camshafts for K12's and so will just copy over the dimensions to the new cams if that's what you're asking? They already have predetermined figures for increasing duration times and clearances from what I can see and so it's a case of just installing the reprofiled cams (porting and polishing is preference based).
http://www.pipercams.co.uk/pipercams/www/product.php?pid=NISMICBP270
you will probably find that the inlet mechanism will release itself when you remove the chain phil, so you would have to take that into account when timing the new chain