Why don't you read the post again and then read mine, He said there were 2 different sized v6's.
People have had 3sgte's engineered in E7 & E8's so it could be a option, The atmo fto v6's aren't bad driving wise, Bit of power when you need it, I had a 05 triton 3.5 v6 for a work ute and for a weight of 2200kg's it hammered but not sure if you can do a 3.5 conversion.