So my 2015 rubicon with 173,000 miles has blown a head gasket. so being a professional mechanic for almost 40 years, logic says buy a short block vs repairing because of parts cost and wear on engine. My question is what is the difference between the 3.6 erb and the 3.6 non erb engine other than the 3.6 non erb used in grand cherokee and challenger can produce more horse power and torque. Anyone know if the block is the same as far as engine mounts and crankshaft flywheel mounting. From what i have read the non erb engine is the better short block to buy for the added upgrades to pistons and valve train. Any thoughts ?