dual TBI ??

GM's factory dual TBI set up was for two (2) single-bore TBI units atop a Crossram-style intake manifold. Each TBI had a single injector. The Crossfire was used as the L-83 350 in 1982 & 1984 Vettes and as the LU-5 305 in 1983-1984 Fcars as an optional engine.

I think what you are talking about is dual 2-bore TBIs, to get more airflow than just using either the Crossfire set up or the later GM 2-bore TBIs used on 305, 350 and 454s. That idea has been kicked around a lot on the Thirdgen.org forum, and on the Crossfire Vault website (forum), as well as on the DIY EFI email digests.

Here's two TGO (Thirdgen.org) starter links:

http://www.thirdgen.org/techbb2/show...ight=mefi+dual

http://www.thirdgen.org/techbb2/show...ight=mefi+dual

HTH.

Went with a MegaSquirt computer for the fuel system and ended up running twin 454 TBI's. Still working on the performance, but it started up on the first try. The offenhauser intake looks great on my third gen.....