if this is a fatory 4 bolt main block. ( not a block someone converted to 4 bolt mains)
the it a 351 cobra jet out of a mustang
3 is 1973
F dearborn assemble plant
consecitive number of the car is 200525
since the number starts with 2 its out of a ford
and i believe they only made mustang and cougars at the dearborn assemble plant in 1973
it could have been a hardtop,grande,a convertable, a fastback or a mach1
thats the best i can do
if you need more information than that you would have to have marti auto works do a search for you
if this is a factory 4 bolt main block , the engine code should be a Q , ( i have heard of 4 bolt main 2v engines,from the factory, but i have personaly never seen one, and probably 99.9 percent of the factory 4 bolt main blocks were 351 4v engines)
my best quess for the engine ( assuming its a factor 4 bolt main block)
is that it came out of a mach 1 mustang
ford made 12558 q code mustangs in 1973
10526 of them were put into fastback, and mach 1 ,of this total 9884 where mach 1
1064 put into hardtops ,grands
968 put into convertables
so the chances are good but not 100 percent
but i would go 3F05Q200525 as the serial number of the mustang it came out of