I was wondering if a 455 I think it is a oldsmobile will this work for a SBC are they the same? How do I determine the CFM of this carb? Thanks

The throttle connection is likely to be different than your stock accelerator cable, as is the connection to the transmission throttle valve cable. Some of the really early q-jets had an exhaust passage on the front of the throttle plate, but I doubt yours does. Otherwise, all q-jets will bolt to any q-jet manifold. The fuel inlet may be different, coming straight in from the front instead of from the right side like most of the later ones.

Depending upon the year and application, the big blocks usually got the higher flowing q-jets, in the 800 CFM range. But, then, my 84 full-size van w/305 has a 795 cfm, while the Edelbrock replacement on my 396 is only a 750 (which is plenty big). For a better idea what you have, find the part number on your carb and use it to start chasing down info.

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82 Berlinetta, orig V-6 car. Rescued w/86 LG4/TH700R with all harnesses, sensors, ECM, etc. 2.73 open. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LB9 w/ZZ3 cam, ported heads, exhaust, paint, etc.).
57 Bel Air, my 1st car. Currently 396 .030 over, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.

[This message has been edited by five7kid (edited October 07, 2000).]