Step 1

Bring a large pot of salted water to a boil over high.

Step 2

While water is heating, warm anchovy oil and olive oil in large saucepan over medium. Add sliced garlic, and cook, stirring constantly, until golden brown, about 2 minutes. Add anchovies and crushed red pepper, and cook, stirring constantly, until warmed through, about 30 seconds. Add clam juice and vermouth and increase heat to medium-high; bring to a boil.

Step 3

Add clams, tossing to coat in sauce, and cook, covered, until clams start to open, 6 to 8 minutes. Using a spider or slotted spoon, transfer clams to a large bowl, reserving mixture in pan. (Discard any clams that do not open.) Once cool enough to handle, remove meat from half of clams, and chop; set aside chopped clam meat and remaining clams in shells. Discard empty shells.

Step 4

Crush tomatoes with hands in a medium bowl, and add with juices to mixture in pan. Add salt and bring to a boil over medium-high. Reduce heat to medium-low, and simmer, stirring occasionally, until thickened and saucy, about 15 minutes. NOTE: About 5 minutes into cooking tomato sauce, add linguine to boiling water. Cook until al dente, about 10 minutes.

Step 5

Reserve 1 cup of pasta cooking water; drain linguine. Add linguine to tomato sauce and toss to coat. Add reserved pasta water, 1/4 cup at a time, gently tossing until desired consistency is reached. Add clams, chopped clam meat, butter, and parsley to pasta mixture, and gently toss until butter is melted and pasta is evenly coated. Serve immediately.