.007 ?????? being a jorneyman machinest I know you can get drills that small, but most the time you need a special machine to use this small of a bit because of the breakage factor. Also a .007 will not come in a standard 1-60 drill index, a 60 is the smallest which is .040 A drill that small is only twice the size of a average hair .
Also if you did use that small of a drill the holes will fill with oil and carbon deposits in no time and won't do there intended function, if indeed there large enough to work at all.