Do it right and pull the engine. I also suggest taking the K frame / front end out too and getting that stuff cleaned up / painted. You will regret it if you don't.
One of my pet peeves is seeing an engine compartment where the color was hosed on over the brake lines, wires, hoses, upper shock mounts, etc. With the engine out, it really isn't much more work to remove (unbolt) everything down to the sheet metal. And all vintage Mopars had body-colored engine compartments. It doesn't bother me to see more customized cars with contrasting engine bays, but a "restored" car just looks more correct with body-colored metal. It's a Mopar thing.
Just my 2 cents, everybody is free to do what they want.
