i have been looking for some autolite 3116 plugs for my 49 b. (recommendation from this site) have tried the local parts houses with no luck. they say they cross to a different autolite number, but when they bring these out, they are a small plug with a long reach. have got the same results at both local stores. i thought the 3116 plugs were a large plug like the champions that are in it now! the parts man said he didnt know what to tell me, that the computer is showing them to be the same as the ones he showed me.(both stores same answer) he even showed me computer screen while he was searching, and this is indeed what it showed to be a match. what gives??