Rebuild or replace

[Mv7fd]

Most of you have read about the problems I've been having with my truck last night I pulled the top end of the motor off and looked at the lifter it is trashed and the cam is junk as well. So now I'm wondering what is better to do should I get a new gm long block and put the new stuff on it or just replace the cam and lifters and put the new carb and intake and stuff on the old motor. This motor has a little over 100 thousand miles on it. I'm really torn on what to do