Dropped Manifold ?

Never seen one like this,,looks to be for a 4 barrel ?

Four Barrel? That's an exhaust manifold for a six cylinder engine.

lol,,did i mention I don't always pay attention?

guessing some sort of truck, perhaps diesel?

Not Diesel. There is a tube for the choke heater

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 58Mustang</div><div class="ubbcode-body">Four Barrel? That's an exhaust manifold for a six cylinder engine. </div></div>

4 barrel manifolds for 6 cylinder engines are uncommon, but available as aftermarket and over-the-counter parts for most 6 cylinders. They're very popular on Slant 6 Mopars, for instance, especially the dealer-option "Power-Pack" setup.

This manifold is very long, and I suspect it's for an engine too old to have a 4 barrel if it's a car engine. If it's truly a 4 barrel manifold, perhaps it's from a truck or semi engine.

Again, it's an exhaust manifold. 1 barrel, 4 barrel, 10 barrel, it doesn't matter. There is no carb flange. As with most inline manifolds, the intake fits into the spaces between the port flanges. This engine had an intake with three runners feeding two cylinders each. The flange area in the center is the "hotspot" that warms the intake.

^ true dat ^

a picture of the other numbers on the manifold may reveal the casting date at least ...