Does a 1996-94 350 engine with identification number 14093638 have 2 bolt main caps or 4 caps?

That engine identification number, 14093638, is not a standard GM identification number format for a small-block Chevy 350. Therefore, it's impossible to determine the number of main bearing caps based on that number alone. GM's casting numbers and identification systems are more complex than a simple single number.

To determine if it has 2 or 4 bolt main caps, you would need to visually inspect the engine block itself. A 4-bolt main cap block will have four much larger bolts holding each main bearing cap in place, while a 2-bolt main cap block will have only two smaller bolts per cap. Alternatively, you might find a casting number stamped on the block itself that could be looked up in a GM parts catalog or online database to determine the specifications.