I don't know something doesn't sound quite right. What size is your back tires, and what is your tac say at 60 mph. My 340 with 323s and four-speed would do 85 or 90 in 3rd gear no problem. And would just purr at 70 or 75 in fourth gear.
I agree. I ran my Duster with an 833 4 speed for a few years with a 3.55 rear end ratio and 26” tall rear tires. I would regularly commute on the freeway like that, at 3,400 rpm it would do almost 75 mph on the freeway. In third that same rpm is about 55.
Don’t get me wrong, 3,400 rpm does not sound like idle. But it doesn’t sound like a shift point either.
