I'm not talking 600 hp, to me that is ridiculous. When I was younger and had all the time in the world we souped up everything from 170 cu in Plymouth's and Fords to Chrysler big blocks. They were all a blast to drive. My daily driver was a Hurst shifted, 4 speed, 64 Barracuda, 273 with about 300 hp that started and ran like it was FI. That was in the 70's and got mid 20's steady highway cruising. Want to burn rubber, spend an hour and swap gears to 4.10's. My 2009 Challenger R/T 6 speed manual gets 28 mpg. My 383 auto 68 Cuda gets high teens steady cruising on the highway. No mystery, efficiency goes up and you get the best of both worlds, FI or not. I don't even run heads past 1971. I run factory Carter carbs, a MP chrome box and distributor, and solid lifter cams. Are you faster, probably, but I already figured out I'll never have the time or money to play that game. Street only, fast, handles well, stone axe reliable is what I build for. No special parts, no computers, no cutting, just good machining and quality parts. I have always had one since I was 19, and that was 48 years ago. That is what A Bodies do best. The 2009 Challenger rolls easy and is very quiet, great car, but they are two different animals. I put more miles a year on the 66 Barracuda.