Top swap possibility
 

So I was browsing craigslist for the hell of it and found a 99 GTP for $800 OBO. Bout 2 years ago I picked up a 97 for $1200 but ended up selling it for a mean profit. I'm tempted to try and get this one and use it as a donor and maybe be able to make it run N/A and make some money back.

Now here's the question, it has 200k on it, mine has 135k. I know this one's probably to old to use, and my monte is getting there. Now if I were to buy this baby and do the swap, and do a full rebuild of the engine and tranny while I'm at it, how long do you guys think it will last me? I plan on rebuilding every 200k, but with wear patterns and what not I know that's only gonna last so long, question is how long.