I had a problem with fitment with the MoPar mini starter on my big block. I ended up with what looks like the same thing from Partzfinders that fit at a suggestion from a been there done that fella. To top it off, it was only $80.
I used to go through starters at a monthly basis. (318) The local auto store I used to live by asked what was up? When I told them headers.....He said hold on. Opened up the books and gave me a hi-temp 360 starter. Never had a problem since.