OUTLINE: Randomized study. Patients randomized to Arm II should have a preoperative hepatic angiography; at laparotomy, an intrahepatic arterial catheter is fused into the gastroduodenal artery to establish an infusion of both lobes of the liver. Arm I: Single-Agent Chemotherapy with Drug Modulation. Fluorouracil, 5-FU, NSC-19893; with Leucovorin calcium, CF, NSC-3590. Intravenous infusion. Arm II: Single-Agent Chemotherapy with Drug Modulation. 5-FU; with CF. Intrahepatic arterial infusion.