Thanks Bruce.
Built-up the Webers from the HRM kit. Was concerned there was going to be interference with the export brace but looks like they are going to get along fine.
Length of the transmission seems to be the primary limiting factor. The (7) engines on the left fit, the Moebius 427 SOHC on the right is both too wide and too long.
Thanks Daniel. As far as planning I just follow a sequence that would work (I assume) on a 1:1 project. And I do a fair amount of research which I enjoy.
Added an axle stiffener.
The MotorTrend article I posted states:
Thomas brought in both Randy DeLisio and Dave Mathews, both 1967 Shelby historians, who confirmed the shell is in fact a 1967 Shelby, but which exact Shelby (of the 1,174 cars built) remains a mystery.