I Need Ideas-New Electric Motor-Different Shaft for Pulley Mount

Help.
I purchased a replacement motor from Graingers for my band saw refurbish.
1947 Delta 14" band saw gets a new power plant.
The old motor has a 1/2" shaft with a flat for the allen bolt to mount.
The new motor has a 5/8" shaft with a key way.
Should I bore out the pulley?
Can I buy one that fits?
What would you do?
Thank you for your help.
Jeff

 

Clueless, I bought a pulley from Ace. $10.
Problem solved.

 

The table is going back together. I have the table on 180 out in the pic.
It is going on Craigslist next week.

 

Had the same problem I did not want to drill out the pully ,plus the shaft on the motor was a little too short.........went to the lathe made a "extension for the shaft" 1/2 inch female with grub screw to secure it to the small shaft, 5/8 shaft on the other end [milled a flat spot for the pully screw] and made it long enough to level the belts between pulls........simple fix works great!