Even after doing the POR15 treatment on my late 260 tank, I still have issues on the race track. I'm pretty sure the pickup screen is clogged and I can't get to it or even see it, so I went to my parts stash at my dad's house in Ohio and found a tank that I've had for close to 20 years. The tanks is very clean inside, so hopefully I can use it in my '74 with round top SUs. The tank came with a parts car I bought way back when, so I don't know what year it is. The 260 tank is still in the car, so I can't compare them side by side yet, but from pictures I took a few years ago, here are my observations. On the outside, it looks about like my '74 tank. The sender is in the front and the large and small vents are stacked on the back wall. The only external difference is that the drain is near the big end, while my '74 tank's drain is in the center. The inside looks similar to my '74, but has a shorter divider wall and I can see the top of a cylindrical baffle around the pickup. I'm guessing it's a '75 tank due to the baffle, but I need to know for sure so I can locate the proper sending unit. The sender that was in it is slightly different than the one from the '74, but still has the same nailhead-style wiring terminals. If it is from a '75, is there any issue with using a FI tank in a carbed car?