For comparison purposes I checked the dipstick from my 68 RR. I know the dipstick is not a repro. Not sure if this info applies for 71...

I measured from the cap to the end and got 16 3/4"
Cap to F mark is 14 3/4"
Cap to A mark is 15 3/8"

Overall from end to top of the curved handle is 18 1/2"
The dipstick was cut and has two rivets, this is approximately 4"-4.5" measured from the cap. The overlap is 3/4"

I do not see a part number on this dip stick.

Hope this helps.

Jim