I'm having some motor mount to frame pad alignment problems. I have a original 6 Cyl car that was converted to a 327 by the previous owner. When pulling the engine the motor mount pins were very hard to remove, I'm not sure how he ever got them in. The frame pads are labeled 3945507 (L) and 3945508 (R). After reading some previous posts it appears that these were used in 1969 302, 350 high horse. When I lower the engine back in with new motor mounts the left hole matches up the the right hole is about 1/4-1/2" off. I have tried every possible enging mount for a 1968 application, nothing seems to work. Should I replace the 69 frame mount pads with 307, 327 pads. Any recomendations on suppliers for good quality reproductions. THanks!