Not sure if anywhere used Speedway motors, but got a discount code via email, 25 off 250, 50 off 500 and 75 off 750.

Code is: CRUZ

68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram