There is nothing wrong with older NR built the same way for years. All though older one's meaning pre Brian Brush might have a little more hand crafted love.
The model you are looking at is probaly a Seahawk (not like todays seahawk) or Ranger, The older boats typically had a 66" wide bottom but some had a 72"
As far as engine and jets typically they are going to be 350 Carb engines and some Ram Jet EFI 350's. You might even find some Redline Ford engines. Jets will be kodiak 3 stage, a good jet can be a little loud, but performs great. Later models typically in the 2000's would have a hamilton 212.
hope this helps