But why ? Single cam's are horrible pieces of crap. Even in stock form the KA24DE is alot more reliable then the KA24E, just from seeing how much quicker the E's tend to get into the junkyard before the DE's my DE had 194k+ miles on it before i swapped it and it was still running (although it would puff out a little smoke sometimes on startup it was running nonethless). Bottom line , why mess with the single cam when the DE is very easy to find , more potent , and has much less weakpoints. Do as you please but to me the SOHC engine should have never even left the assembly line , it was probably a failed nissan design that they where going to use for boat anchors but decieded to put them in our usdm zenki s13's. Do as you please though, it's your car (just bare in mind that with the money you are going to be spending , you might as well just go ahead and swap a SR20 in their). I do not mean to be negative but it just seems like a very irrational and illogical idea.