"...if you ran an electric pusher fan forward of the radiator...which kinda ruins the whole effect in my opinion" and looks terrible to boot. I've never seen a sbf in a early Ford without cuttting the firewall either. Dennis' example is exactly right about an easy swap using a sbc and matches my experience exactly. Sorry Tim .
Before they had modern tires...it was briefly the best way to increase weight transfer. Tire tech soon changed everything in drag racing. Those altered wheel base cars were the state of the art for 1965 but very quickly became obsolete.
"But if you're really interested, you can always check out my Fotki page." You and Paul have very similar taste in colors and subject matter...you would also love his collection of real cars. These discussions are always interesting..from some suggesting that the prices he gets are somehow fake to "I would never sell my work" , He makes a comfortable living as a professional model maker and 1-1 car restorer....I think that's pretty neat. ( I should add that we've been friends for 25+ years)
If you are going to build a 29 roadster..you'll need the floor pan from the "highboy" to build either version,as both versions use the same floor. The other floor is for the upcoming 30-31 coupe. It is NOT for either version of the roadster....if you look closely only one floor matches the 2 firewalls.