I have a 74 Maverick that I have only owned for a couple of months. The previous owner replaced the gas tank at some point, looks fairly new. I know that the 74 had a 17 gallon tank and 76 on had the larger 19 gallon tank. Auto Krafters only carries the 19 and they say it will work in the 74 if you use the longer straps. I assume that mine is a 17 g but I suppose there is a chance that they put in a 19 g. The reason I need to know which one I have is I need to replace the sending unit and want to make sure I buy the correct one. I really don't want to drain out the tank and refill to find out capacity, then drain again to change the sending unit. So my question is, is there an easy way to tell 17 vs 19 gallon while the tank is still on the car? Maybe by measuring the outside dimensions? Thanks.