Here's a link to the Los Angeles Times obit for Al Lohman. It gives the year of his teaming with Barkley as 1963, which is arguable. Barkley's autobiography has it as 1962 and every other published source says '61. This may be a matter of definitions. Initially, Barkley was an exec (and occasional newsman) at radio station KLAC who hired Lohman, began joking around with him on the air, and then left the office job to be his partner. The discrepancy over their start date may stem from one person counting from when they started working together and another noting when they first billed as a team. Or something like that. (Also, here's a link to a short obit from Associated Press. It says they were a team from 1961 to 1985.)
The Times obit also gives the years of their KNBC show as 1967-1970, which I'm sure is way too long. I believe it was two 13-week cycles. And boy, was it a funny show. I don't suppose anyone reading this has any tapes…