Your two questions require very different skills sets. I'll try to help on the first but I'll leave the second to others.
The first ten BT29s to appear in the US arrived in Hartland WI, Franklin Lakes NJ, Washington DC, Palm Beach FL, Oyster Bay NY, Paramus NJ, Alexandria VA, Granby Quebec, Columbus OH and Brockville Ontario, but we can only currently connect chassis numbers to four of those. If you can trace your car back to SCCA racing, that may give us a few clues.
What do you know of your car so far? Feel free to email me at
allen@oldracingcars.com if there are some details you don't want to put online.