Hello all..Changing the rear main seal on a my 68 with 74 351 windsor...Got it all busted down to the top seal and it wont budge at all. Tapped it pretty hard but dont want to mess anything up. I even read to crack the main caps 1/4 turn to help...i did loosed all except the very front and it still wont budge...any other suggestion before i decide to snatch the whole engine out. Thanks many times in advance