help please .gearbox ?

[s12pickup]

how much would box be and were from if i had to collect,thanks. found a couple for sale of ca18det 200sx .are these still different.?goin to change oil tomorrow see if that makes any difference.sorry for lack of knowledge but new to these cars.cheers

[CamInHead]

S12 "B" (early) and "C" (later) g/boxes;



Note the C is larger and has a different shift mechanisim.
S12 C vs S13 C;

[s12pickup]

thanks for that mate ,picture great help.