If you go too far forward, it looks like the oil pan would hit front crossmember..... Mine is a 3/4 ton though. My water pump pulley is about an inch from the radiator (stock radiator location). I'm not sure if the oil pan or the water pump would be the constraint if I went furher forward; I chose to leave a little clearance at both locations and cut the firewall. good luck........let me know what you end up doing.
