Weird 904 to 408 magnum starter interference issue. Dakota starter won't fit? 64 push button trans. is that the problem?
I’ve had this problem with a 400 block. I had to grind the area circled in blue.
Also had to remove the copper cable attaching piece on a mini starter to make it work with my magnum. I just bolt the solenoid wire and heavy red battery wire straight to the starter now.
(The oem version of this piece is what I took off the starter)