adiaw83,

I don't see why you can't do it to 300SD. You need to get your self a boost gauge. That is very important. You don't need anything more than a 20psi gauge. I used an old 2 5/8 autometer gauge that I got from someone with a supercharged mustang. It has a vacum side that doesn't get used in a diesel. I plan on changing it out for just a boost gauge. I will try and locate a digital camera because my scanner quit. Those pictures should be up soon. I got a question for you guys, how much boost can these things handle? I'm not planning on any more but, it be fun to know. thanks.