Alright cool thanks for theverything input. Whats different from the truck to cart motor? Because there's been people saying to swap the 4.2 v6 into the Mustang because it's "easier" but I want the experience and want to do this. If they trick motor works why wouldn't the expedition? Isn't everything controlled within the computer which will be from a mustang? Not trying to argue just wondering.
And what transmissions are compatible with the 4.6 and 5.0?
The reason I'm asking here is because methods are spotty. That's what I was getting at
The blocks are the same from car to truck to suv, but the internals are a bit different. The cams for one are a major difference between cars and trucks/SUVs as the truck/SUV needs a lot more low end torque and minimal high end, where as for the car, you want balanced low end and high end, or more high end.
The 4.2 swap is a good one, and one I am going to do once I have the time to drop my engine in, but you basically just use the block and crank, and use the rest from the 3.8 (cams, etc.).
While the computer is what controls everything over all, the wiring harnesses can be different from vehicle model to vehicle model, so that poses an issue using the expedition motor with a mustang computer. Along with that, different vehicles have different upper engine/intake configurations, such as the side the throttlebody is on, etc.
For transmissions, the Auto is a 4R70W and can be used on V8 or V6, but you have a 5 speed. I believe the TR3650 is what you would want to use for your application. It is the 5 spd from the GTs and Mach 1. For a lot more $$ and a lot more headache you could also do a 6 speed swap from a cobra (T56) but that is a lot of work that isn't really worth it for your application.