440 decoding

I have ah engine I need help in decoding the block casting numbers. I look all over the internet and no one seems to know what one means and the other I would like more info for. Putting you'll to the test!

2nd pic for same block

1975 440
T=trenton
maltese cross & X =.010 undersized crankshaft

There is no mystery there. Just a normal late model 440. Cast in 1974 and used in a 1975 model vehicle. If you look at the VIN you can probably narrow down which car it came in although in 1975 there would not have been many choices anyway.