Swap A833 for Auto - 71 Duster 340
Hell it won't even scratch them!
Something is wrong,
My 367, on the street, smokes any tires including the 325/50-15 BFG Drag Radials, thru 2 a gears and deep into the third. By it's Eighth Mile trap speed of 93@3467 pounds, the Wallace Calculator says that is 433 hp. I am running 3.55s, but I am sure it would easily do that with 3.23s as well.
You have all the basic ingredients to do that too.Even a stock 1970 340 would smoke the tires thru 2 gears.
I highly recommend a compression test. If the problem ain't there, then you need to look into the tune; starting with making sure the carb is opening up all the way,
then; finding true TDC, and then ignition timing, then your secondary tip-in, and finally your cam-timing.
Unless maybe you have an overdrive box,lol.
With 3.23s your second road gear in that box is a paltry 5.39, as opposed to 6.20 in the standard box. That's a 15% torque
reduction right there. But if you had that box, your first gear would be 9.98 as compared to just 8.59 with the standard box, which is an
increase of 16% in torque multiplication, and you would interpret that as a crappy 1-2 split, which, in fact, for a cammed up 340, it is. And, I'm sure you wouldda mentioned that......
If you find the clutch a PITA; was the car originally a slanty, and if yes, then the pedal ratio could still be from that slanty. And if you have a 3-finger clutch, that, for sure, is a mismatch.
But additionally, the 3.23s force a lo-torque engine into an unhappy rpm, most of the time, with those tall tires. For example;
20 mph is ~
2060rpm in first/
1490 in second.
30mph is 3090/
2235,in second
40mph is 2980 in second/
2150 in third.
If you have a lo-compression 340 with a cam, it will not do well below 3000 rpm. So the first thing I would do is a compression test.
