Truck is a 1997 Ford F-150 XLT with Triton 4.6 V8 So neighbor's truck is leaking oil around the front of the transmission/rear of the engine(I only took a quick look, but may be rear main seal or head gasket). Anyways, he took it to a shop and they won't repair the leak, only replace the engine...and they want something like $3000 to do it. I've tried looking for other engines but no shop/junkyards has any of the Triton 4.6l V8s and I've only found two on craiglist that are about 60mi away and they want $1100 and $1200 ('98 115k mi, and '03 86k mi). It looks as though the 4.6 from the cars and 5.0s seem much more common. Would it be possible to swap one of those in? Also, did the 4.6 Tritons change during the years(would the 03 engine work in a 97)?