Yao, seriously tho. I agree with Strohmyer...You are crazy. 450-500 is stupid power for a little S13. There are hella people with reliable SR's making 350ish horse and that power would be adequate. Either way, you build good stuff, keep it up!
PS: if this doesn't work out, drop in a German V8 or inline 6 TT ? Now that would be first! LOL