im fairly sure the DET has oil squirters in the block itself, some machine companys should be able to fit your block with the squirters, i know Silvia Engineering used to advertise it, but they dont exist no more.
im afraid thats about all i can answer, but like buses, another member will be along soon, that im sure will have better knowledge of this.
Not sure if this is the CA18DET or the SR20DET it dont say on the description, and i have seen neither.
http://media.photobucket.com/image/c...lsquirters.jpg
And this below is taken from the S13 CA18DET workshop manual.