The PS13 had an SR redtop, so the gearbox was exactly the same as all the other blacktop 5-speeds. All the props in these cars are built in 2 parts anyway, so was just a case of splitting the S15 prop and bolting an S14 front half to it.
A lot of people are mislead by information about the conversation as some places state you need certain parts from an S14 as they are different, turns out a lot of the parts were actually the same as on the S15! I might put up a post on the mechanical section stating what parts you exactly need.
Yeah nice one would be good to know although I'm going for the RB box conversion. With that I'll need adaptor plate to keep my S15 clutch/fly, new crossmember made, prop split in half like yours but there's also the gear stick adaptor to make the gear shift sit where it should be otherwise you'd have to cut out half the console lol??!!
I'm not too sure about the RB conversion mate, but you will just the conversion kit. You can use your clutch/flywheel with the S14 RB conversion as the exedy twin plate kits are the same for the S14 and S15 I think.