I have used Totally Awesome for cleaning my exterior and interior with good results,
get it at your local dollar store, word of advise rinse off good shortly after applying, good luck!

86 Daytona - 612/ glide - 2400lbs - 8.60 alot more left
71 S/G Challenger - 469/glide - 2800lbs - 9.20s and tuning
70 Challenger - mild 440/727 - 3475lbs - 10.96 best
70 GTX - future quick 16? more $$$$$$