help with some engine numbers

[Mk1-Paul]

well i might be away to buy what ive been told is a 1500gt engine but im not what you call great at understanding the engine numbers and such so would anyone be able to confirm this?

 

the block and head are painted blue. I took rocker cover off to have a look and the valve springs are singles but look new ,also the water pump looks new ,apart from that I cant say about possible spec. It came out of a MK1 Cortina and has a single choke on plus the later Escort type oil pump. The block is a 120E and the head a 116E . There are some digits on the block above the drivers side engine mount which look like L6c 644E or F roughly stamped

 

 

thats the description of it that i got so how does it check out guys? And btw this will be going in my 105e if i buy it