i thought they were also in early navaras over here too

Do some more research ... Ozdat will have more answers than here.

hmm different bell pattern for the RWD ones you say? cause I was hoping to get one from a U12 bluebird as thats the only platform they came in over here. I'm really hoping I can use this engine because you can get turbo kits on ebay so cheap, same for rebuild kits and clutches etc..
and the bigger size helps with the 520, so I can use it for towing etc. I was going to use install a VG30 turbo but the conversion would be a real headf$%$k in a 520, I know they fit in a 620 but they're slightly longer in the engine bay yea?

anyway I'll keep plugging away, hopefully something will turn up.

Transmission for RWD KA24DE engine block is no problemo: Z-series or KA-series transmissions may be used. Same bell-pattern.

KA24E came in 1989-1992 U12 Pintara (T trims).

On KAs, I'm not 100% sure, but think 1) the FWD versions use a different bell-pattern than RWD versions 2) Oil pans differ and you can't swap them (rear sump or front sump). Although some guys say you can swap pans, so perhaps some versions swap. But I think some KA pans won't fit on some other KA engines. Proceed with caution or just modify your crossmember to suit the pan.

* USA Nissan Pickup (D21 & D22) is rear sump
* USA Nissan 240SX (S13 & S14) is front sump

I'm after a Rear Wheel Drive gearbox to suit the KA24 twincam. I'm putting a KA24DE into my 520 wagon as this would be the easiest swap and need the box obviously. I know these are similiar to the silvia SR20 box but the bellhousing is different unfortunately. are the boxes in the terranos similiar? anyway, I know they definitely came out in the US 240SX's but I'm not sure what they were in over here (if infact, they did come out) anyway any assistance to locating one would be appreciated.
Tom