engine question

will a 4.0L straight 6 engine from a 94 xj fit into a 99 xj will i have to change all the acessorys?

You'll have to change over or splice the fuel injectors, MAP sensor, Cam Sensor, Crank Position sensor, Coil, A/C, (2) Coolant sensors, oil pressure sensor.

I think that's it. You get the idea. I swapped in a 99 TJ motor into my '94 YJ.

Can i unbolt all the sensors of the old engine and bolt all to original sensors back onto the new engine or would i get away with changing the block and head alone? thanks for your speedy reply