Lots of Mopar shops in the Detroit area so that shouldn't be a problem for you. A 383 is just like any other engine, compression, ring seal and air flow is what makes it work. Some Edelbrock heads, flat top pistons at zero deck, and a Performer RPM intake will do wonders for a 383. Don't go crazy on the cam and you'll be fine.

Hard to build an engine like that for $3000 though unless you find some used parts.