Front is a walk in the park as is the cross over.
Rear....If the downpipe to manifold bolts don't fight, it'* not bad. The EGR 10mm is a little pain, I used a swivel 10mm socket and it went good. Otherwise. it'* not bad.
Rear: I removed the bracket the O2/fuel lines connect to, and working almost 100% from the driverside, you can get at all the bolts pretty well. EGR as mentioned is a little time consuming. If possible remove the two studs that guide the manifold on the block. Being sandwiched between the downpipe and engine is not a problem w/o the studs. A little pain with them in. Then rotate the passenger side end of the manifold up and with a little wiggling pull it out the top of the engine bay