Engine mod help!!

[mudrunner35]

for the ltr motor, if i put a 474 kit in it while keeping 11:1 compression and a stage II hotcam in it, would i need to run race gas? what are the most effective horsepower porducing mods without using race gas?

[LTR450_#67]

You need to run a fuel controller if you aren't already....then you need to have it dyno tuned.