differences between 97 and 00

Ok so I have a 99 1/2 powerstroke and looking at buying a core motor and rebuilding the whole bottemed with the best rods and cam and other stuff for when my motor goes. I found a great deal on a 1997 motor. I do know the HPOPs were slittly different and that the 97 had single shots. Are the bottemends pretty much the same???

Thanks
Tyler