Hi,Long Shots for sure.And I didn't find a Kenneth Rash on the Social Security Death Index list but that doesn't mean he hasn't passed.List may not be complete.If he was married, do you know his wife's first name?I hope you have success.
There is a Kenneth D. Smith associated with the address for Kenneth and Donna Rash. The Kenneth and Donna Rash for this listing is about 62 which is an appropriate age of someone that could have been a child of someone born in 1921.
Kenneth & Donna Rash 1520 E Buena Vista Dr Chandler, AZ 85249-4311 (480) 802-2206
There is a Mrs. Kenneth Rash age 83 associated with this Kenneth Rash who is in his 60's as well.
Kenneth Rash 858 County Road 3057 Center, TX 75935-5539 (936) 598-2149