Everything is ORIGINAL never been replaced, except for the radiator (once). The car near 200,000 miles mark and I am going for 250,000 miles :) This was the best model and quality workmanship of all T-birds made. I get almost 29 MPG on open hwy but average is 26 MPG on hwy. Sweet :)
Spark plug is WRONG kind by the factory specs ! Buy the cheapest COPPER plugs, because that works better accoring to a t-bird club. I replaced them and it's BETTER than factory plugs. Also replace spark plug cables ! (buy cheap ones only and do it yearly.