Sorry, but the Ford 3.8 is an almost exact copy of the GM 3.8
read this:
http://www.babcox.com/editorial/ar/ar90134.htm
The designs of the Ford 3.8 and the GM 3.8 are so alike that the bore and stroke are nearly identical: The GM measures 3.80˝ x 3.40˝ and the Ford is 3.81˝ x 3.39˝...