Who besides yenko had cars built to their specs at the factory?

all these cars were skunk cars that were painted black with white stripes. they all had 427 or 454 engines with 4 speed transmissions. the monte carlo had a factory 4-speed that this comany had installed at the factory. the three styles were camaro,chevelle, and monte carlo. do u remember the name of the company that did this? it was not yenko. the skunk style was their trademark. late 69 or early 70's were when these were made.