I am going to purchase a new 1970 20 gallon tank, fuel sending unit and tank to fuel pump lines for the 65 coupe. It will have a 74' 302 and a four barrel carb. Any reason why I shouldn't go with the 3/8" line over the 5/16"?
In fact you'll need to use 3/8 because that's the size of the outlet on the '70 sender. For clarification: 1970 tanks are 22 gallon, while the '69 is 20 gallons (but also with the 3/8 outlet). You can use a 65/6 sender (with the 5/16 outlet) but it won't read accrately... it will read "full" until you start going below 16 gallons.