It looks like this may be Isky's version of the 327, 360-375H.P.
what we all refered to as the 30--30 cam. I used it in a 60 over 265 and a 283 in my 56 Chevy. That price they show is for the whole kit,but it still seams pricey. The cam would be much tamer in a 400 than a 265 thru 327.Since You've had it since the 60s you may want to use it for nostalgic reasons.