EV2 is the paint for the outside of the car. It's not the same shade as hemi orange engine paint + EV2 has metallic in it to boot.

I painted my 400 pickup engine with PPG single stage. The paint store did not have the paint code for the gm orange paint (or any other engine paint for that matter). They did offer to mix up a batch of whatever I wanted if I provided a sample to go off of. I simply bought a can of Duplicolor engine enamel for them to use as a reference. Talk to your paint supplier and see if they can do the same thing.