Who cares what one man's opinion is and what facts did he base it on? I have people all the time looking at my stock Duster and almost all tell me how fast these cars were back in the day. One guy told me he had a transplanted 427 in his 67 Chevelle and there was a 340 Duster he could never beat. Be proud for what you have. A 454 Ls6 is great, the 455 Stage 1 maybe better, the new Hellcat better yet, the Hellcat Demon even better...etc etc