umm. ok.
FS5W71B L SERIES,CA (PRE TWINCAM)FJ20,
FS5W71C single syncro. RB20e,rb20de,rb30e,REDTOP RB20,LATE FJ20ETrb25de,ca18de,sr20de
FS5W71C twin syncro RB20DET,SR20DET,LATE CA18DET
FS5R30A SINGLE SYNCHRO.vg20det,vg30e vg30et,rb30et
FS5R30A TWIN SYNCHRO, VG30DET,RB25DET,RB26DETT.
fs5r30a pull clutch. 33gtr late 32gtr,rb25 neo
upgrades..
FJ20ET TO RB BOX. elongate top bellhousing bolts inward about 6mm each.
fj20 tight ass secondhand box replacement. anny l series box or ca box (aka bluebird box)will fit. you just need to swap the bellhousing. as the angle is oposite.
early fj use a small bearing on the countershaft front. will need to be swapped onto the doner gearset.
rb 20 upgrade. a 25 box will bolt up. the tailshaft yoke is differant and the gearbox x member needs to be moved backward 50mm aprox.
vg upgrade. swap internals from rb25det
rb30 upgrade, as above.
fj20e,lseries,ca18,sr20de rb20e,rb20de use a 225mm push clutch
vg30e,et usus a 240mm push clutch
vg30de uses a 240mm push clutch
sr20det 240mm push clutch
fj20et 240mm push clutch
rb20det all use a 240mm push clutch.
rb25det all uses a 240mm push clutchup to r34 skyline.
rb25det neo uses a 250mm pull clutch
rb26. pre 94 uses a 240mm push clutch
rb26 post 94 usus a 250mm pull clutch
vg30dett uses a 250mm push clutch
not listed is s15 duel mass flywheel clutch. the norm is fitting a s14 clutch and bearing carier.
all 250mm clutches can mix n match,
ie rb25det upgrade is a r33gtr,rb25 neo flywheel with a vg30dett clutch disc atd plate. small mods needed. to rear main seal plate/engine flange plate to clear flywheel.
r34gtr uses the same clutch as the 33 but on a diferant flywheel.
non turbo variants with the small 225mm clutch can swap for the bigger turbo clutch/flywheel asembly of the same engine family.
all 71b,c boxes have the SAME gear sizes. later ones have improved bearings and selectors.
all 30a boxes have the same gear sizes, later ones have bigger bearings and improved synchros,selectors.
thats about all i can come up with atm my head hurts.