I swapped a 1980 integral head motor for a 1968 pickup motor. It has a TH350 in it. The starter that came with the 1980 block will not fit the 1968 block. I know about the offset bolt style that is not tapped in the 1968 block. I went to the local starter repair and he said all i needed was a housing interchange with a straight across bolt pattern, he did it and it will not fit? How many teeth should be on the flexpate? I put the same one back on that was on it.I would appreciate any help! Thanks in advance!