that sounds like a nice bow,, just make it a bit wider for the heavier weight,, you can always narrow if you need too,,,60ish should be no problem,, just make your fades very gradual,,I like to back my bows as well,,deer goat or thin cowhide,,
this bow is osage about 60 ntn,,,,pulling 59#@ 26,,, it is 1 3/4 at wide part of the limb,, side profile is about 1 inch reflex,,
I am sure the hickory will make a bow less than 2 inches wide,, but I would err on side of wide,,if you can,,,,
I like backing the bows too,, I think on a board bow will add some durability to any run out,, I am not an expert on heat treatinig, but I think a least a light heat treating will add to performance,,and help keep string follow to a minimum,,,that being said,, should shoot great with no heat treating as well,,
shooting with mindfulness is key,, I prefer shooting a heavier bow with lighter arrows for up closse deer hunting,, nothing less than 450 seems good for me,, a 450 grain arrow out of a 65# bow is effective,,
I think rawhhide backing it before you pull to full draw would be a good idea,,