The heads are fairly easy to pull on the 5.7 hemi without removing motor. Manual says in order to remove heads that motor has to be raised in order to remove exhaust manifolds but the heads can be pulled with exhaust manifolds attached as long as manifold to exhaust pipe bolts, 2 per side, have been removed. Easiest way to obtain access to these bolts is by removing the front wheels and removing the plastic wheel well that is just held in by plastic fasteners. Removal took me about 6 hours total with hand tools and no air tools. Heads are at machine shop getting cleaned and tested with the valve seats being replaced and checking for possible curling on the intake valves.