I think you'll find it not to be to bad. I took the whole motor apart and out in 2hrs. I spent a whole day putting it back together though... I was very picky.
Do you have a digital camera? If so, you can post the pics or email them to me and I'll post them for you. We'll see what people think. I thought my topend was shot and it ended up being the crank. I put a 4mm stroker in and it ended up being about 1300 or so with grand river racing pro port and head mod for the 4mm crank. That's top end ported, bored, pistons, crank, and gaskets.
If you were happy with the way it ran, you can rebuild it for a lot less.... Even if it is the crank. A lot of people sell their stock crank in order to go stroker.
If it the top end, you'll only have $200 - $300 in it. Good luck. It's really not to bad.
The reason I asked where you were was to see if you were close. I would have given you a hand.