Originally Posted by cuatrokoop

See if Chris @ Force5 will send you a picture of the driver side of the EV motor he has, would give me an idea about what sensors needed bosses drilled/tapped (i'm betting few/none).

There are a couple other things you should think about. One being, what are the wrist pin diameters of both motors. May be different. Second is, what is the distance from the wrist pin to the piston crown on both, would be less than ideal if the 7A pistons were sticking out of the EV block. The EV also has the 95.5mm stroke crank with 81mm bore cylinders, so you'll need to get the block bored for the 82.5's and honed when you have it drilled for the oil squirters. Crank will need to be balanced with the 7A pistons as well (will also help with the engine retaining the ability to rev to 7200rpm).

Something else to think about is that the Hitachi computer does not know how to deal with the extra displacement. The MAF is pretty small, injectors aren't that great flow wise, computer is not adaptive enough. One way around it is to run a custom fuel rail with larger injectors and an Apex'i S-AFC or something like that, to allow more fuel into the engine. I also have a feeling that the factory cams won't allow quite enough air in to really make a big difference in power from the 2.31L to the 2.55L motors. A set of Schrick cams would definately help out, as would the factory tube header.