Gus...I found a 1999 cobra with 122k miles for sale for a good price. My question is how many miles is to many miles? What mileage have you guys seen on these engines?
If it were me, I would consider the price difference between a low mile '99 and compare that to the price of the one your looking at but include the cost of a rebuild. Is the price Really good? I am not trying to say it will blow soon, but any car with over 100k is no spring chicken. My '99 only has 11k on it, so I cant speak on the reliability, but my '93 now has 136k 'er so and it runs great, but is starting to leak oil etc. Also how it was driven and how it was maintained play huge parts in the life of an engine. I would take all of these things into consideration before buying.