To see if he is deceased, check the
Social Security Death Index. It reflects the latest information provided by the Social Security Administration as of July 2006.
Small side note: Census' are available after 70 years. All census' through 1930 are available with the exception of 1890, which was lost. In 2010 the 1940 census will be made public.
PPS: If you get a hit from the SSDI, you'll only get partial info unless you pay for a subscription. I have the subscription, so if you find him there and want the full info, just let me know and I'll look it up for you.