Hemi guy is right. I had a brand new '70 Cuda w/ 383 HP, (one of the first in this area, my brother had the other one) Both our cars had Hemi Orange motor. Also I have seen quite a few others. The local Dodge dealer has a '70 Challenger w/ 383HP & his engine is hemi orange,( all original car except ext body paint.) But, it is your car, & if you aren't going back original, then red isn't bad either. Plasticote also has a Chrysler industrial red that is pretty good too. Ovmf