OK! How do you tell two SR20DE motors apart.
I want a S13 Engine. Both are non-turbo.

If you go to a workshop and the mechanic there shows you two motors only. How can you tell which one came from a S13 or S14.
Both have silver rocker. Same block heads so how can you tell that the mechanic is not cheating on you and selling you a S14 engine.

Do you me B13 and B14, because S13 and S14 didn't come with SR20DE's they came with SR20DET's. There is no such thing as Silvia/240sx with a rear drive SR20DE.

Im sorry but you wong on this There is no such thing as Silvia/240sx with a rear drive SR20DE. Search for an .au site and use 200SX and you will see all kinds of silvia's with just de's

He is in Brunei, not the USA. I think he just might be referring to the Australian Silvia (200SX) like you mentioned, Aztek, even though even he is nowhere close to it.

Yup, there are RWD S13 and S14 here with just the DE. Silver Block, Yup, non-turbo. So how can you tell the difference and i'm refering to the Japanese version which we all have here. All Brunei cars come direct from Japan either new or Re-con.