Will the 4.6 from the mark 8 directly swap into my 1997 thunderbird.i couldn’t find any other forum on this specific swap
It would have been easier to drill and tap during the install .. Now you need to take it back apart and do it all over again. Learning experience.
There are two temp sensors .. The one wire sensor is for the gauge in your dash. The two wire you removed goes to the PCM .. Which controls the cooling fans. If your cooling fans are not operating correctly your engine will overheat.
I have never had a "blown head gasket" on a 4.6 but I have seen warped heads which is basically the same thing.