Biggest watch-out seems to be the break-in procedure for the new cam. Involves a high-zddp break in oil and some specific instructions. Failure to follow proper break-in has led to a number of reports of premature failure on replancement cams in BHW, BRM, BEW engines.
There is also a special puller to get the cam pulley off the cam - you're going to need to buy or borrow one.
Also good to do the timing belt at the same time, but not absolutely necessary.
All done, what a difference. One lifter was holed, and one lobe on the cam was flat. Didn’t have to pull the tandem pump, but loosen the 3 bolts that are easiest to get to, that gave enough flex to slide the new cam back in. Can’t believe what a difference this made, like a new car. Half a million miles here we come.