My ep82 came from japan as a 5EFTE build, lots of torque from the longer stroke and very good fun, can say don't bother running a CT9 with it mine lasted 2 month after i got the car. Your right in saying you'll need - 5efe block 4efte cylinder head and 4efte pistons better to get performance forged 4efte pistons, turbo (obviously lol) turbo exhaust mani. You will also need to replace your clutch as the bolt pattern won't be correct for a 4EFTE clutch the one thats on mine is an EL45.55 clutch, i'm sure one of the techy heads off the forum will be able to tell you what car it's from, not 100