I have my rebuilt motor back and the rebuilder has a tag stating to retorque the heads after 1/2 hr of running. I think I can get to the bolts w/extensions and universal joint but I'm concerned the the torque values will not be correct. My questions are do the heads really need to be retorqued? They used FelPro gasket set 260-1149. If so how do I adjust the torque to compensate for the 8" extension and universal joint.