Anyone have a right side crank case for 2066 motor (most 78-79's)

So yesterday I found a set of cases on ebay and paid my money. Today seller refunds my money telling me that the cases are too far gone. Nice to have an honest seller, but now I'm on the hunt for a RH case. I'm pretty sure 78-79 WR, OR and CR 250-390 interchange, based on part numbers, as well as the 77 OR390. I don't care about paint and grime, but must not have any cracks or JB weld repairs.

Gotta thank this site, I will make a donation too. Ive had several responses, thanks!

Hi, Do you know if the 390 gearbox is the same as the 250 in 1978 There seems a lot of 390 gearbox's but not any 250?

Yes 390 cases are the same according to part numbers. I could not find any 78-79 390 cases that were defect free on eBay but problem solved by a forum member who has a nice set for $50!