I am building a fresh 292 for my 55 Ford sedan.Engine is lightly modified-zero decked,pocket ported etc.I am using an Isky cam . When inspecting the new cam I noted that the oil groove in the center journal was only about .010" deep.I checked 2 stock cams and got .028"& .030" depth.I stuck the cam in the lathe and made the groove stock depth.Question is I wonder if I needed to do that? I used this same type Isky cam in a 312 40 some years ago and didnt do that. Dont recall any top end oiling issues.Anyone have any ideas?