Bad Day, Very Bad day

At the least, you will need to remove the drag link, and take the motor mounts loose to jack the motor up as far as you can. Pretty easy then, should come right out. I always used some 2x4 chunks of wood, to block it up.

The only time I ever bought a killer (bronze) oil pump drive, was when I built a solid roller motor. But, if you are going to run an HV pump, I would get one. You know the definition of insanity, I am sure. But if you are going to put a standard pump back in, I wouldn't be concerned with it.