On the intake no. It could be a 390 but also a 360. The 360 has the same bore block 4.05 as the 390 it just uses a shorter 3.50 stroke crank. In essence it's the same block between the 390 and 360. Just different cranks, pistons and rods. As far as the heads go the C8-H heads were very common to find and are pretty much standard FE heads. Same casting as the later D2-AA truck heads minus the induction hardened seats. C8's are a good head and with some work (port and bigger valves) can be a nice performing head. They were used on the 390,428,360 and a few others so they are not specific to a paticular engine. You'll need to dig into that pup a bit to see what you have.

G.