I called quick fuel, and to my surprise they quoted me two out of the box 650 double pumpers. Said the engine will want the fuel shot of the dual squirters and vacuum carbs are very in consistant..

I also have an EZ-efi on a vehicle with a single four barrel. Been thinking of putting the 408 in that vehicle with the tunnel ram and duel TBI's...The tune with EZ efi is much easier to keep track of and very consistant. Best all around of both worlds.

'70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk