I have alway used the Mopar P5249644AC style Nippondenso mini starter due to the low weight. You can get them from everywhere as they are frequently re-manufactured

As you can see one bolt hole is larger than the other. They usually come with a spacer but I just drilled a nut and ground it round to make it fit.

Also are you trying to install the headers with the starter bolted in? It helps to jack the car up as high as possible for more room. Take starter off and install headers from the bottom