Best CFM carb for a 416????

I'll second 1Wild there... Also - the Ultra line that Brian got most power from - It has no provision for a choke (similar to the HP950..) and no provision for factory throttle or kickdown linkages... So While reading about a cool dyno session is cool, sometimes mimicking the package might no be what you're looking for... That's why I use the Avenger series a lot - they are basically a bolt on and the normal adaptors and works great on the longer stroke small block.