Glen,
The Webers do add the WOW!
response from people. Can't count the number of people who stopped by to look at the FIA at the US Vintage Grand Prix and were in awe of the Webers. While I absolutely love them on the race car, I am not sure how well the IDA's would do on the street. They are not really happy under 4,000 rpms and they really love 5,000 rpms and above. If you were to use downdrafts the IDF's might be a better option for the sweet.
A Holley would work just as well too. What ever route you go will be the right one for you. Unless it is parked with the bonnet up, nobody knows what's underneath the bonnet anyways.
Good luck.
Cheers,
Jim