Re: ford big block decoding
The engine appears to be from a 1972 Production run as indicated by some markings on the cylinder heads, intake manifold, and the images of the block.
For the most part, all 1971-1978 short blocks are the same, however the single year, 1972 cylinder heads are not desirable for a high performance naturally aspirated engine and should be replaced. D3VE-A2A heads are the easiest and most direct replacement and good for at least 400 hp or more depending on combo.
Feel free to call for further details, it's way too much to type