Both of the guy's are right!
But all I did was just make sure none of the ends were on top of one another b/c I blow-torched a piston b/c the ends were stacked on one piston in my old '64 Ford fairlane S/W's 221", V-8 motor, (was supposed to have been a 260"er, but??), years ago and had to put the 221"er back in it out of my old '63 Merc. Meteor..
Years later, I did a dingle-berry, shade-tree, $150 overhaul to the old 260"er and ran her another, (I kid you not), 100,000 miles more just a putzzing around!! Heck, it had at least 117,000 miles on it then b/c it only showed 17,000.. Might a been 217,000??
Loved that old Wagon!!
AND I NEVER BEAT ON THE OLD CAR, NEVER!!!