340 stock cam

ehhhh......that's not true. By a long shot in fact. If the grind is aggressive enough, you can get all kinda valve train noise from the valves being slammed shut really quickly. A lot of these new fast rate cams are very hard on the valve train and can certainly make noise even with hydraulic lifters.

then he should just dump the cam if that's the case. it looks to be a very mild cam.

here's the cam card:

http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=628&sb=2

i guess if he's running 1.6's or 1.7's that makes it a much bigger cam, but we dont know anything about his rockers yet

ding ding ding ding: here are the cam install notes
2 [2] Requires machining on cylinder heads.
7 [7] Stock springs cannot be used.
23 [23] Includes special shafts & spacers.
24 [24] Special 10ยบ 4 Groove Lock. Single Groove use part #612-16.
37 [37] Adjustable valve train required.