440 going with efi?

the fast 2.0 "does" have timing control. and is good for more h.p. than most of the others. how well does it work over the long haul? I ain`t got that far yet.

They say 625 hp, iirc. I don't know how any of them work long term, which is why I went with the MSD Atomic. I trust MSD's brand and I'm hoping they designed it right.