Twin Turbo Roller?

Nice combo. Do you know what it runs as is N/A? The big question is whether or not you have forged pistons. I have used up to a 350 shot on the KB hypers before but one mistake and they will explode! I tell everyone who will listen, if you keep it from detonating you will look like a hero and you will be surprised what the motor will handle. I had a similar set up as yours, with forged pistons, and it ran high tens in a 3440 pound Dart on a 9 inch tired street car. The tune up is very important and if a little nitrous is good then more is not necessarily better. For someone who is venturing out on their own the first time with nitrous I always recommend a 100 shot from a plate. DO NOT GO DUAL PLANE!!!! The distribution will smoke one cylinder or two. People get away with running a dual plane and nitrous do it by running the thing so rich that their 150 shot really only gives them 80 hp. When you have it tuned right a single plane is a must. I also recommend a really good fuel system that is built with proper research. Another tip is to get a jet map from NOS so you can properly use the jets that match your fuel pressure. Fuel pressure greatly influences fuel mixture. Lastly DONT CHANGE the gears. What works with your N/A motor will be way over geared for your N2O set up.