MSD distributor 408 stroker

SGBARRACUDA said
That is the same part number MSD Dist. I have in my 416. Did you compare the length to the old one? Or is this a new build? I assume you installed the oil pump drive? Was the oil pump drive bushing installed in the block? Need more information.

This would be my question to the OP...did you forget the oil pump shaft? Looks like this.