You made a great point. I bought a Cuda with 440/6 pack performance crate motor that dynoed at 486 hp. I hate the carbs but like the nostalgic Mopar big block 6 pack idea. I came very close to buying a 392 6.4L and doing the swap. Even with a killer deal on the engine, $3500, I figured it still would have cost me around $12-15 all in to do the swap and I would still have the same horsepower. Just does not make sense. But I found a company called F&B that makes a fuel injection 6 pack set up. It is pricey though, around $5-6k and I would still have to change my tank plus install. But this is a unit that very few people have and allows me to keep the traditional Mopar 440/6 pack set up but have the modern convenience and tunability. Just my two cents.
I have 2 of the F&B systems (one SB and one BB), they are very nice systems. You are very close on the price to do the conversion, my BB was about $6500. I was tired of rebuilding the carbs and all of that. The EFI is definitely the way to go.
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)