Don't waste you money - I've ran both LD340 and Airgap on the same engine and there was no noticable difference. If you have the space - add a 4 hole spacer 1/2"-1" and it should improve bottom end torque and maybe idle.
Thestover, you're getting sleepy, very sleepy.... you are to sell crackedback you're LD340 for $50... crackedback, LD340, $50... (CLAP) You're awake now!!! :lol: