Yeah it has always been a chassis dyno so it was set up like it always is. I had it on maybe 3 different dynos over the years and every time the operator has come and said it was going lean on top and I might want to consider swapping over to a Holley carb. I'd have to go back and look but it starts to go lean around 5000-5200 and my limiter won't let it go past 5500 so it doesn't get any better. Actually the first time was too weak of valve springs so it never really got that far. I ve been through so many versions of 400s, I don't think I've ever dynoed the same motor twice but the carb has always been a Qjet. Those dyno operators probably always suggest Holleys just because they are just easier to tune. Like I said I hope it's taken care of with the fuel pump arrangement I have in place now. If I run it again and it's still going lean I will swap in a 750DP I bought just in case. Haven't done it yet because it would mean figuring out a new throttle linkage setup again.