I totally agree, guys.  These motors should last a good long while, but then again, I don't have any history on the motor.  No telling how the previous owner treated it.  i have run it and it doesn't smoke, and seems to rev cleanly. 
BUT.....if I have the heads off (plan to get a used pair and port them) and the front cover is off (replace the cam), I might as well re-ring the damn thing...no?....and if I have the pistons out, I might as pull the crank....and if I have the crank out, I might as well put in a stroker crank....no?.....and if I put in a stroker crank, I might as well put in some nice H-beam rods...no?.....and if I am putting in some nice new rods, I might as well put in some nice light pistons...no?....Just while I'm at it!!!   
  
Schmokin!!!  somebody stop me!!!   
  
Tim