I'm NOT real KEEN on a lots of details of various years/body styles. But, for several years, I had an early '30 Coupe & an early '29 Coupe, side by side. It's really AMAZING to study the DIFFERENCES!!! It's almost like havin' a "MID-SIZE" & a "FULL-SIZE" Model A.
The '29 has a SMALLER & more aerodynamic frontal area & was better suited for DRY LAKES competition. Bill W.