Will my cam go flat????

[Bilgewiper]

I wish this was about my 71 C-10 350 but, it's about my 98 Chevy fullsize van motor 350, 85k miles. I am the orgianal owner, and have used Mobile 1 almost exclusivly in it except for breakin. Just recently 1 lifter goes completly dry if the motor stops with pressure on the pushrod. Whats my chances of just replacing the lifter/lifters and not the cam and NOT having my cam go flat from a new wear pattern? In the past on the few motors that I have built i always replaced the cam with the lifters. The rest of the motor and van is in excellent shape and I want to keep it. I am not looking fwd to this job as the motor is right under the dashboard and I don't want to do all that work and have the cam go flat next. So whats my odds ? Thanks.