you could look at the 2.4 16V related engine in the Nissan Silvia etc, anything can be made to fit, Skyline engine perhaps but it depends how much work you want to do. The 2.4 16v is the same series of engine but from my research isn't a straight swap, there are straight and V 6 cylinder Nissan engines too. Probably best to ignore ford stuff as in reality these trucks are Nissans through and through.