Roller cam/lifter retro drop in, thoughts?

Hi, I have 440 and 383's and thinking of a retro roller/cam set up. These are suppose to be drop in and go. Are they? Anyone have some experiance this these? It seems with a roller there is less chance of wrecking a cam due to low zink levels in the crap they sell as oil now.
More expence for a roller set up, but does it or is it worth the bother?
Thoughts?:burnout: