Mini starter that will work with sb TTI step headers

i have seen many posts with issues using TTI headers and mini starters on early A bodies. I installed my TTI headers on my 69 Dart and my 440 Source mini starter barely went in and is touching two tubes once mounted. Can someone please give me an exact part number they know for certain will work? I only want to buy one more starter. Thanks everyone. Small block 408, w2 heads, 1 5/8 1 3/4 step.