canister vs. screw on oil filter

[1969 GMC]

here's another stupid question guys and gals...went to Napa today to grab an oil filter, my truck has a 350 with the canister type oil filter. the guy looked up '69 GMC in the filters manual, and it gave the PN for a screw on oil filter. I just had him get the PN for a '68 GMC, since it was the canister type. My question is this, when exactly did they stop using the canister type oil filter? Last time I went to the same Napa, the store owner looked up '69 GMC, and went and grabbed a canister filter off the shelf. One of the parts store regulars (those old guys that are always standing around in there) said that my engine "had to be from a '63 or earlier car or truck" because that is when they stopped using canisters, but I think he's wrong. Maybe I should just check Mortec, to see if I really do have a 350 and not something else, that would be indicated by the canister oil filter. Phew, sorry for the length, any info would be appreciated.