another what is it?

just scored another 440 motor just curious what it might of come out of? only numbers i found where on dizzy pad 6t440 below that 4 6. the pad on the side of the block by pan rail was blank. what made me curious was its a regular cast crank motor, but it has a front sump oil pan w/windage tray . any ideas. thanx danny

my 65 D100 big block had a front sumper & some? vans had front sumps.