Plugged oil lines to the Lifters 235 Chevy engine

[GOPAPA]

I might be buying a 235 Chevy 6 cylinder

If I remember right ,,that if the oil canals or what ever you call then is plugged up with grime so that the lifters cannot get oiled ,,your about screwed..

the only way to clear them out is maybe some synthetic oil or tear down the motor and ??

any one ever addressed this ? what did you do to fix the problem