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You don't need to worry about over carbing with the 850's.
Hotroddave40 got 29.5mpg in his super mileage 318 Cuda with an 850.
Get the "biggie sized" TQ to start with! The TQ will only pull what the engine demands from it.
The 800 and 850 TQ's have the same size secondary butterflies. The difference is in the primaries.
Me thinks a small motor street motor that sees a lot of around the town driving would want the 800 for the better vacuum signal where it matters for drivability.
Even the small TQ at 800cfm is huge for a stock stroke small block.
2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"
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