Richmond pro gears or not? Help

[RTK_line]

I’m looking for some information on this ring and pinion set. I purchased a complete 3rd member that my cousin had built for his 440 dart. That was 30 or more years ago so the specifics are a little fuzzy now. I thought he told me that they were 513 pro gears from Richmond. I searched the internet but haven’t found anything. Maybe someone has more knowledge on the subject. Here are some pics of the numbers on the gears themselves. Thanks in advance for your time.

 

[jimjimjimmy]

count the teeth on the pinion and divide it into the ring gear tooth count that will give your ratio .

 

[jimjimjimmy]

I just checked two sets of Richmond gears and the ratio is not marked on either set .

 

[RTK_line]

I just checked two sets of Richmond gears and the ratio is not marked on either set .

Thanks I’m not unsure of the ratio just if it is a pro set that are softer for racing. The dart was built for the track but someone offered him good money to put it back to street drivability. So I bought the 4200 stall converter and 3rd member.