<VV> OTTO OT10 CAM?

[N2VZD at aol.com]

recently i built an engine for the rampy with powerglide.  all is fine  , 
but i cant seem to keep valve adjustment , whole valve train gets noisy after 
 a short time.  i use the lucas break in additives etc , so i doubt the oil 
 is the issue. this is not my first corvair engine by a longshot!  , in 
fact  3 others running very good in the last 3 or less years. so over the 
weekend we  attended a corvair club event where i was discussing this with a 
person who just  put together a similar motor with same source of cam and 
lifters.  turns  out he is having the same problem. today i plan on taking lifters 
out and  looking at them.  any other guys out there run into such problems? 
  this is the most i have spent in time and money on a motor to use and 
enjoy ,  but the most trouble also.  it runs good , but sounds like a 62 fuelie 
 vette with solid lifters .
so looking for answers from people who have actually run into this  , NOT 
theories on valve adjustment , oil quality ,etc. as i get older , it  gets 
harder to deal with possible bad parts or such out there.
i may just put an old 9889 cam and its matching used lifters ( they look  
real good!) into it.
regards, tim colson   (loosing my  cool!)