Great concept, excellent execution so far! I'm loving it!!
The surfwagon application is too kewl! GO!
Just one thought ~ a suggestion.
Professional cars were based on mid-level models not top line performance coupes/hardtops.
Your hearse has an Impala rear bumper with three lights each side. Station wagons and professional cars would have only two lights each side, max, Bel Air style; and, lighting would never extend under the door/hatch. I'd recommend filling the center-most light sockets and rechrome the bumper, using just two lights each side. Besides more integrity with the concept, it would actually look better and more balanced.
Just my two centavos, man. Great project either way.