RZN149R-3RZTURBO

Hi everyone, my name is Daz and I live in Brisbane. I have a white 1998 Hilux single cab tray back ute (rzn149r), 3RZ-FE motor, 5 speed manual. Mods include turbo, 38mm external wastegate, 3" intake 3" dump pipe, 3" mandrel exhaust, front mount (all piping & cooler blacked out, Haltec ecu, rising rate fuel reg & gauge, rear leafs re-set 2" lower, torsion bars 2" lower on front, super pro poly bushes throughout, lsd, ford territory rims (gloss black pearl flake). It is my daily driver and is a lot of fun. In the pipeline are bigger injectors and more boost.,

What size steering spline on the steering wheel end is a Hilux 1998 rzn149 2wd, I am needing the size to purchase a boss kit