So maybe it’s a USA vs Canada detail
But I’ve only ever seen the straight parallel to block fuel pumps in trucks through to 53 model year
With a glass top filter bowl
I usually don’t peak into anything newer at the junk yards
And the metal line from the pump to the carbs are definitely bent for straight in out pumps all the way to 54
Perhaps they came that way from factory and if/when the pump failed it was expected to use the angled pump officially
But so far for me in SK all my trucks (and there are 12 and counting from 48-53 on my farm) use the parallel to block style
-s