Originally Posted by ShadowImg
Worth it is up to you. It's not difficult per se, in terms replacing a block it's probably easier than many. It isn't cheap, though. The shortblock alone will cost you $1800 or so.
a buddy is gonna help me with the labor (i figure 4 hands are better than 2) can i use the same cylinder heads or do i have to get new ones to match? can i pull enough off the 255 to make it worth it going to the 57 as opposed to just replacing the 55? as you can probably tell, i'm still a rook haha