First what blew? I know they still use cast cylinders on the fans so it can be bored out and just over bore pistons is needed, few hundred bucks. I would change the fan belt if it uses one? I can't remember but i have done tons of 488 and personally i think its a far better motor you just can't kill them and parts are dirt cheap just don't mod the motor of any kind they just don't last lol Been there and not going back. I would fix it its worth less but its a real pain to part a complete sled out unless you have done it a bunch and have lots going on. The sled still is a good runner if you know what the problem is with it? Normally the top end goes but if the bottom went i would go with a 488 as you can get a complete one for a third of the cost of a 550 crank.