I haven't been on here in quite some time. I thought I'd share my new build up with you guys. I just put a 440 kit in my 400ex. Just got it running yesterday. I got the 12.5:1 weisco, stage 2 hotcam, port and polish and a Doug Eichner Edelbrock carb. So far, I haven't really rode it hard yet, still breakin' it in. I have nailed it a couple of times and I can tell I'm going to love it. I'm still tinkering with the carb, but I changed the plug this morning and it has the right color so I should be pretty close. Later.

 

I just put a 440 kit in mine too im still rebuilding it .... I hope it change something

 

Yeah so far I'm happy with it. It doesn't run as good as I thought it would, but it does run better than the 416 kit with a stage 1 hotcam I had in it before. Good luck with the buildup.