440 what am I missing here?

And fair warning, the math is still incomplete (the reason I tagged AJ). It’s really the vapor pressure index (VPI) that determines just how far large you can go. But at 9.4:1, you’re safe with the Comp 274 XE. It’s parameters are 9:1 and 2000 rpm stall in a 440 with 3.55-4.10 gears. But that one in straight up with some headers and it will still carry out well on the occasional blast. There are some of the older Crane grinds with wide LSAs that would work better than expected here, too. But if you really want to take it to a different level, Oregon cam grinders or Bullet cams could set you up with a high lift/shorter duration cam with maximum .200 lift duration that would not only provide more power over a wider range, but also pull stronger vacuum and make the EFI easier to tune.