I got my one-piece custom steel driveshaft made locally near Chicago at
http://www.shafts.comTotal was about $375.If you plan to use them..... then I need to provide the list of u-joints/input shafts they had to order and list it in this thread because otherwise mine was the first and last 240/RB25 shaft they will ever make.....Usually a custom domestic shaft takes them 1-day. I walked in on a Tuesday..express shipped the parts from their warehouse/supplier on the west coast...and had the shaft on my car on Thursday.Greaseable joints recommend greasing every 3k miles- should last 100k miles. I could only dream of making enough hp to destroy this driveshaft.
I modified the stock RB25 mounts and R33 cross member = free- no hitting hood- -steering shaft/02 housing clearance fine--no front oil pan/sway bar contact--shifter perfectly sitting center to center in shifter hole-Center of front U-joint with RB25 input shaft bottomed out inside the transmission...to...face of differential = 41 inches for me (S13 hatch with longer '95 J30 LSD).