S14 is the chassis code for the 1995-1998 model years (same chassis code as Japan, though in Japan it was 1994-1998)

S13 was from 1989-1994 (89-93 in Japan)

S15 was from 1999-2002 (japan only, we didn't get S15s in the USA).

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if I had to guess he had done an S14 front end conversion.

a lot of guys put S14 front ends on S13s or S15 front ends on S14s.

do you remember if it had pop-up headlights, or fixed headlights? projectors? were they curvy or sharp edged?

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I'm a big S-chassis guy, I've got that S14 with the V8 as well as an S13 convertible with a Siliva front end conversion