identifying the l18 and l20 blocks

[topdon tha mechanic]

hie guys ,im new here .i own a 510 datsun which i got a couple of years ago ,this car came with 3 engines ..l16,l18 and an l20...in pieces ...
i need your help on identifying the blocks so i can start building this toy....any information would br greatly appreciated.....im from zimbabwe

[PL510]

The L-20 block is taller than either the L-18 or L-16. If the head is off you can measure the cylinder bore to tell which is which. The L-16 is 83mm (when original). The L-18 is 85 mm (when original)

[J510]

Hi On the left side of the block there should be numbers stamped or engraved into the block normally starting with L and an number eg: L16 1234, L14 12345, L16 1234. Ths should tell you which one it is. Hope this helps you.