EFI or Blowthrough?

ok guys whats the consensus on efi vs bt. i'm bt at the mo. is efi easier to tune. thinking bout making the change, but need convincing its for the better.
what size injectors would be needed, what controller, link, megasquirt ?
have 2 x walbro 392 pumps 1/2" feed, 1/2" return.
got water/meth set up.
this is street/strip.

oh yeah its a 410 sb, s475 turbo.
cheers
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