I myself prefer styrene too. Then it could be painted with Metalizer...you might even be able to find a Metalizer that looks like it's got the ceramic coating on it.
The AMT '66 Nova Pro street has a bare block with heads, you'll have to find the timing cover, valve covers, water pump, intake, carburetor etc. though.
The wiring would be the same as any small block..here are a couple pictures.
What other alternatives to bolt heads are there, besides hexagon styrene and the RB Motion ones? I have nothing against the RB Motion ones, they're just too expensive for me.