Everybody loves the Hemi motor, but there was an embarrassment of great motors available: 340, 383, 440, and the 427 Hemi. I think the 340 six-pack was the one that won the Car and Driver shootout of the era, and the one used in TransAm racing, which had a 350cc displacement limit. Drag racers, then as now, liked the big block motors though. The 440 sixpack is legendary.
I also like 1970 Mustang Mach1's and early body style Cameros, and the Dodge Charger has been growing on me...