[weim55]

But yea, while I'm careful with audio from a video, that certainly sounds external to me. List off the top of head in priority:

Starter bendix engaged

Flywheel to crank bolts too long

Flywheel rubbing-hitting something (carefully turn and look for witness marks)

Too long crank pulley bolts hitting timing cover

Timing chain hitting- rubbing timing cover

Fuel pump arm hitting the timing chain

Steve weim55 Colorado