What the W

Looks like the engine has probably been rebuilt sometime in it's life, so, likely a frankenmotor. You won't know about which crank it has without pulling the pan and taking a look at it. I've seen those W intake before too. Never saw anything special about them either. Your engine has some items that are truck specific.....engine mount brackets and passenger side exhaust manifold (318-3 manifold). There's also some sketchy looking pulley and bracket combinations for the water pump and alternator. I wouldn't attach that ground strap to the water pump either. That can cause some weird electrolysis in some cases. What are going to put this engine in? What are the head casting numbers?