I was thinking along the same line Tim, he may be talking Lincoln Y's, however there are some other Y's that were specifically truck that were 302-332 configurations, I don't think these were considered the lincoln Y's as those were 317-341 and 368. They were torque monsters for their small size according to my 58 book.
The Ford y's the only difference may be the way it mounts on the bell and front instead of the side and the timing chain cover and pulley may be differnt on some models, the older ones especially.

55 Vicky & customline
58 Rack Dump, 55 F350 yard truck, 57 F100
59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?