Im currently part way through a rb25det neo swap into my S15 silvia.
Car was factory sr20de auto but was manual converted previously.
I am using r33 front subframe and engine mounts and am using the stock sr20de gearbox with a rb20de bellhousing to make the box the same as a factory rb20det small box.
My issue is the gearbox is sitting around 1.5inchs further back than factory location so the mount doesnt fit and the driveshaft is too long.
Everything I read online said using this small box means I can retain factory driveshaft without mods. Was this wrong?
Is there a different crossmember I could use? How can I use factory driveshaft??