1988 5.2 which intake port size?

My son has a 1988 Dodge D150 2 wheel drive truck with the 5.2 engine with factory FI. It looks like every gasket on it is leaking oil. Lol he is wanting to replace the intake gaskets. So I looked the parts up on Orileys auto parts website and it shows two diffrent size intake gaskets for the 5.2. They are listed as large port and small port. So with out taking it apart how can you tell which port size the intake has. I am thinking sense it has the 5.2 that it would have the small port. But I am unsure so I figured It would be best to ask. Thanks Bobby
It'll be small port, I've got both an 87 and a 90 318 each with 302 heads, they are both small ports. Check Rock Auto, I find their listings more accurate than the box store listings in most cases