You're of to a great start. On the engine, one thing I notice is that it looks like the oil pan and the block are cast together. You may want to sand and fill as needed so this is not as noticeable on the oil pan. An engine can have as great a difference in the look of your build as wheels and tires, Look at pictures of 1:1 cars and try to mimic what looks like you are trying to build. Because the engine block is usually sand casted the painted finish is usually flat or semi-gloss at best. The oil pan and valve covers are smooth stamped steel and usually turn out semi-gloss to gloss finish. If you are building a Street/Strip model then many of these parts could be chromed or cast aluminum or even polished aluminum. Parts like starters are usually different shades of black as are brackets unless its a Show Car where all this could be chromed. In some cases you may have cast aluminum heads and intake manifolds which may also be polished in some cases. A little thinned flat black or Detailer Black-It-Out will really show the cast detail on the engine. Look at the different colors on pulleys for the drive belts on the front of the engine. The most important thing is you are enjoying what you are doing.