Etor
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Here's the deal tho; the 318 has a pretty flat torque curve between 2500 and 3000. Imagine it makes 200ftlbs all the way. At 2500 this is 95hp. at 3000 this is 114. So that's 19hp between the marks.
If your 72 is the Hi-Compression model, imagine it makes 250ftlbs, then the numbers are 119 and 143hp; this is now a 24hp difference. These are maximums at WOT. You can of course get your 318 to deliver less than the maximum by not flooring it.lol.
At 65mph, your rpm might be about 3300, so either TC will be fine. It looks like a city car, so if I had only the two choices of 2500 and 3000 I would choose 3000,lol. but I really liked the 2800 with the 4bbl-low-C teener and about the same starter gear that you have.I'm at 3650 car and driver