Mopar Mini starter making noise

Hi Folks, new to the forum and have a question. I just installed a 408 (360 stroker) in my 64 dart 4 speed. When I try to start the car the starter made a real loud noise which cranking the motor. I took off the inspection cover and noticed the starter gear was still engaged to the flywheel. I had to take a screw driver to get it to slid back into place. It was tight , like the flywheel and the starter gear are too tight together. I have not seen anyone else have this issue before. I am stuck so any help would be appreciated, thanks

Specs
360 engine with 10.5 inch flywheel (Mcloud) 734 bell housing
mopar performance mini starter
Did you resolve your issue? And how did you correct it? I have a mcleod flywheel as well & the mini starter is not stuck but noisy, especially after start up. Sounds like a chevy. LOL.