pretty much with these swaps, the easiest way is to just use the block and head, and re use all your old accessories and manifolds, that way you dont have to modify the fuel rails, accelerator cable or anything

Oh yeh, if you use the EF motor, you have to use your old timing chain cover too ( i think the clutch fans mounts are on it)

and i think xr8 dismantler has a 113,000k EF motor for $650