I disagree. My Kjet abf made 160bhp and was spot on for years. The Kjet is the only thing that was good! H/g went, crank keyway failed etc etc but the Kjet side of things was fine. If you are running a fine Kjet setup then just drop the engine in, it's a weekends work to do a nice job of it. Wiring and fuelling swap etc just isn't worth it for the marginal gains. I was bored within 5 minutes of it anyways, so now it's 223bhp from an agu k03s.