You're off to a great start. The more I see of this engine though, the less I like it. Not your work, the engine casting itself. I know its an ancient mold. The distributor angle is way exaggerated, and those intake manifolds are ridiculously too long.
Good work. Black looks clean. We've already established this is a 1980 year model truck. It is the first year of this body style, and the only year to have faux hood vents by the cowl. in 1981 they were functional, and moved to the sides. Also 1980 was the last year of the L20b engine (in this kit), 81-87 has the Z20s engine. Here's the review from the Trucks section http://www.modelcarsmag.com/forums/topic/91996-124-revell-datsun-reissue/?page=1