So My 4.0L (155kmiles) is out and ready to go into the '04D2. I do need to remove the non-SAI heads and replace with my newly rebuilt SAI heads from the original 4.6L (160K miles) engine. I plan to keep the original 4.0L lifters and pushrods and just use the rebuilt heads.

Any thoughts?

Any special procedures, I just plan to bolt new heads in to all applicable torques and 90+90 turns.

 

make sure you have new bolts of course but I would swap rocker arm assemblies also since the pushrods in a sense "mark their territory" on each lifter and rocker individually.