If it’s a 10069286 block you’re looking at a real good motor. That’s a “4-bolt, Mark IV, (short deck) 454 service replacement” that GM used between 1990-91.

The “HP” doesn’t necessarily mean a lot.

As mentioned, these guys found their way into a lot of marine applications as well and yes, they were painted black – even the aluminum intake manifolds. If the head casting is 14096188 you’re in really good shape – rectangle port, 116cc chambers and I believe that would be indicative of the 450HP version however, without knowing the internals it’s impossible to tell for sure.

Pat is our resident expert on all matters dealing with Chevy BB and I’m sure he will add some meaningful comment when he comes on line today.

What’s he want for it? If it’s reasonable to you, then it’s probably a good deal..

Good Luck,
Glenn