This is going to sound strange but that's what I do best. I have a bank of carbs in very poor order but all I know is that they're not from a 1969/1970 model, with cable pull to all four carbs. Number 3 is jiggered and number 4 has piece broken off the inlet, which is why I didn't reply earlier. This evening, I went for another look and I can't see any material difference between number 2 and number 4 or number 1 and number 3 for that matter. I rely on the forum, like Trigger, Nurse and James for things like that. The point is that number 2 looks okay! If you live in Bulphan, I live about three hours from you, if you walk, otherwise I'm about fifteen minutes away in Brentwood. If you're interested I will take pictures and send them to you. Message me and I'll set to.