Years ago I recall comparing BB and SB lifters side by side and found that the oil holes were at different heights.
I don't know what difference that would make or if the difference only occurred with the two lifters I was using for comparison. Just something to check and consider.
I also recall that one company - forgot which since it was so long ago - had the same part number for both BB and SB lifters, but lately I've seen them listed with different part numbers. Don't know why.
West Point ROCKS!