I Think This engine there was in my car Is NOT the original one. But the block is from 1969
Guess your reporting that the engine was cast in 69. As a general statement - almost half of all engines installed in 1970 Mustangs would have been cast in 1969. Did you look for a VIN stamped on the block? If complete it would provide the year the engine was originally installed in
Butt was it normally the bracket assy,p/S pump MTG was in aluminium On 1969 San José cars
Looks like someone used pieces and parts from other applications and years to make things fit and work in your case or that the engine and all accessories are from another (1970 in this case) car
Did double check and found another dozen examples of 69 F codes with the aluminum PS cradle and the alternator bracket the window for the heater hose clamp formed in it