The Stovebolt Site Forums The Parking Lot Big Bolts 42 GMC COE Manifold ?

According to my book it looks to be a CF300 or CF350. The book only shows them have a 228 or 236, but the 248 block is the exact same outside dimensions. It was common to repower a truck with a 248 when a 228 or 236 was worn out. It looks like the manifold from any CF series from 41 to 47 should work. The PN is 2090602. It may or may not be on the manifold.