Well, as long as it bolts in, you should be able to use a different looking starter. The motor side of things generally does not affect the way it fits unless it is either a really tight chassis or you have headers that wrap around the starter too closely. There were several different pinion noses ( aluminum section) used by GM over the years, but so long as it bolts up it is usually not an issue.I run a junkyard starter I found on a 1985 Pontiac Grand Prix with a Chevy 305 and it works just fine ( It was a new rebuild when I found it for $10).My engine is a 1977 350 of unknown origin, and it bolts right up. However, my car uses a 153 tooth flexplate off a 86 Grand Prix (2 piece rear main seal block) so this would not work in your case. I would try the parts store starter if I were you. Worst case scenario you will just have to take it back. If you want a passenger car application instead of a truck, try getting one for a 1977 Monza with a 305 or 262 V8. It will be a 168 tooth flywheel application and may be smaller due to the tighter fit in the compact Monza chassis.