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Hello Ross,
Did an LS7 with a GMPP carburetor intake, single TB mounted in down draft fashion via a custom adapter plate. Air cleaner made to look like one for a carburetor, MAF hidden in the air cleaner.
Looked retro ... runs great.
Cheers,
Taz
I've done plenty of them with the Vic jr efi manifold and a single 4barrel type TB - used COS3 in speed density. With an air cleaner on, it looks a lot like a carb setup - especially with the gray fuel rails because they blend in with the intake and you don't notice them. That is the way I would go. Idle and low speed transition might be tough with twin TB's, but would be workable if you set up a progressive linkage on them (so that only one opens when you first come off idle)...
GM EFI Tuner
02 WS6 9.41 @ 143 MPH 3675#, drag radials, pump gas, through the mufflers - sold