My Cougar XR7 has about 163K on it, to my knowledge the gaskets were changed out by the dealer I bought the car from so there new. I'm wondering about a rebuild though? I have no experience with engines and havn't done much but I'm wondering what a rebuild would cost on average, or how much a new motor from ford would cost? Just want to have the reassurance of a fresh engine at some point over the next year or so.