Stop in for a cup of coffee

Ok I actually need some serious tech help here from the collective brain trust. A buddy up in Fargo is trying to get a 68 D100 going. He had a slant 225 out of a 69 Dart rebuilt and dropped that in. The truck starter is hitting the oil pan but in theory his cross reference says it should work? I thought “A” body and truck starters were different sizes? The truck starter is simply not going to fit with the Darts oil pan. The trucks original motor was also a slanty. Help please you gurus.
@RustyRatRod what say ye o slanty guru?