or what about changing the pinnion angle by re-positioning the diff by its mounts, platforms etc ? surely that would be work bit easier than cutting up the sump make new mounts to lower the engine?
anyways the only A series ive seen come loose was tightened and the bolts worked loose as they had no form of theard sealant on them if i were building a powie A series I would look into dowling the flywheel aswell