In 69 they all were 400 cars.
Not many differences between all the 455 short blocks. Some had four bolt main caps and then there is the SD. All the rest are cast pistons and rods. If the rings and bearings are in good shape you can make it run well fairly easily.
Just need to know what all you have on the top of the short block.
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73 T/A 455, 4speed
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