Contact 73RR here on the HAMB.....if he doesn't have it he can suggest possible sources from other models that interchange
The 270 will use a 146 tooth count. Virtually all (except the 201-208-218 23" engine) pre-57 engines have/use the same wheel. In 1957 the wheel changed to 172. The oem wheels were available in many different weights. I have some as light as 27 lbs and as heavy as 60+ from a big truck. New, NOS, wheels in the 33# class are available from VPW. Gary