Doug's headers and mini-starters

I got this ACdelco from rock and it cleared my block by miles... i had to modify my dougs headers though.. i bought a old NOS set that i think were old NOS due to being made wrong.. they wouldnt' clear any starter by miles.. i'll see if i can find a pic
https://www.rockauto.com/en/parts/acdelco,3371096,starter+motor,4152