did anybody ever try to shim the pressure spring in the oil pump to get more oil presure,,,,i bought a new oil off ebay and oil pressure is very low,,,,i want to buy a high vol. pump from EB but he won't have any instock for about 60 days,,,,and i need my truck for work,,,,,,,,,,,,,,what do you guys think about doing this,,,or at least until EB get them in