Here's the 477hp 318 B3422w5 was talking about.
Don't know why everytime people think a 318 has to be a super high winding unstreetable mess to make decent power, just needs a bit more rpm than a similar 340 which is only 5-7% bigger depending on overbore.
Iron-Headed Mopar 318 Magnum Engine- Popular Hot Rodding Magazine