I have no clue what heads in have.....

[sixpac]

Idk what heads I have I took a spark plug out and the thread is longer and wider then what it should be in a 93 5.0 I took and auto light ap105 out? What can I do? When I tried to put what I bought in its too skinny and just slides in motor craft sp 502

[dreamstang]

gt40 heads are longer than e7 head plugs. also e6 heads take a longer plug .

e6 heads where only found on 86 years. hopefully someone didnt throw those boat anchors on there.

gt40 heads . you can identify these with some good info in the sticky section. some people identify them by the either 3 or4 casting bars located in the front of the heads. these can be found on 94-95 cobras or 96-01 explorers or mountaniers.