I have both engines, but the stroked 493", 6 pack is in a '70 e-body with a Passon 5 speed. The EFI'd 408 with a 4 speed automatic-overdrive, lock-up/3000 rpm stall torque converter and 3.91 gears is in my '68 Barracuda convertible.
Both are quick and fast, but the '70 is much more so, as it has a touch over 700 hp, and is a handful. The 408 has just under 500 hp, is a blast to drive, gets better gas mileage (15/20 premium) versus (10/14 w 101 octane unleaded) and can is better suited to daily driving.
Either motor could have been built stronger, but street manners outweighed the chase for that last chunk of top end power in my builds. Both cars have smallish hydraulic roller cams for that reason. It was a good trade off that I appreciate every time I drive either one of them.
You really can't loose either way you go. Especially, if you run an overdrive and possibly even fuel injection. I may even convert my 493 to EFI soon. I love EFI.
