2.5l duratec. It’s fairly direct as it’s the same platform as the 2.3l. A speed3 would require lots of modification and also a speed3 gearbox as well. The duratec you can find for usually under $500.
Looked into it, and seems to be a lot of options and I'm having a hard time figuring out what to look for. I created a thread to help anyone else looking for specifically 2.3L to 2.5L, but would you be able to help there?2.5l duratec. It’s fairly direct as it’s the same platform as the 2.3l. A speed3 would require lots of modification and also a speed3 gearbox as well. The duratec you can find for usually under $500.