[ford38v8]

In my opinion, it is not a 59L block nor is it factory relieved, my reasons follow:
1- The L is indented (recessed), smaller, and located on line with lot numbers, rather than raised, and same large size next to the 59, as has been the norm.
2- The Ford factory relieved blocks I've seen have the relief in an hourglass shape, rather than in straight parralell cuts.