I've determined that my block came from a 74 A Body, what kind of cars could be an A Body?

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ericj205@worldnet.att.net
'71 RS/SS in progress (soon to have vortec heads)
'73 LT parts car
'95 Formula

wasnt "a" body the chevelle/malibu/elky line? gotta think about this. b was full size, y is vette, we all know what f is. pretty sure a are chevelles.

A-body is the Chevelle, Cutlass, GTO, Skylark body.

So...does anyone know which of these cars were produced at the St Catherines, Ontario plant in '74?