Originally Posted by massivewangers

If the car was already Zetec converted, then 2.0 has to be the simplest option. I'd skip the 1.8 if you can, might as well fit the biggest engine possible. If you're staying NA, you need everything you can get to start with. Inlet wise, I doubt you'd notice much difference between the 130PS or 115PS inlets. I have heard people say that the 115PS flows better, but not sure how much truth there is in that.

RS2000 engine is worth considering. Believe it takes a bit more work to the engine mount, but it will go, and you can use the usual suspects of gearboxes from RS Turbos and the like, so no worries there. Also means 150bhp and 140lbs/ft out of the box. They seem to respond well to pretty basic modifications, and there's been plenty of engines producing in the region of 170bhp on a standard inlet and things. It's worth considering, given how cheap the parts are at the moment. That and they sound amazing when you give them some stick!