when the machine shop had my motor and heads they told me about the groove problem and they checked my new cam and it was wrong, they grooved it deeper to .035 inches deep, this in turn will oil better

ive been looking at old y blocks with those oiling kits all my live.only saw one on a 55 and it was rebuilt so my have had the cam changed.that tells me the cross drilled was better.anyone else notice this.