The factory tires on 340 cars were E70-14s
The E is code for 7.35 inch tread NOT a a section-width.
7.35 inches equals 186.69mm
On the factory 5.5 inch wheels the section width mightabin plus 2 inches .
Equals about 51mm
This would then total 187 + 51= 238, rounds up to 235mm.
However, the checking wheel for a 235 is 6.5", rounds to 7 inches, so on a 5.5 is gonna be maybe an inch and a half less. Let's call it a 195
This only matters when we go to calculate the tire height.
Thus the tire becomes 195
If the 195 is accurate, then at 70% the sidewall will be 5.37 inches. and that, doubled plus 14 equals 24.75 inches tall.
And that, friend, is pretty close , if a lil tall, to being correct.
the standard tires for a early Duster, were D78-14s, even a tic lower and were mounted on 5s
The front tires on your car, do not look to be in the window of 24 to 24.5
They look to be closer to 27, to me.
At the right tire height, using the 340 ride-height spec, the front of the rockers will be closer to IIRC, 7 inches at the pinch-weld.
Your front ride height, can be set anywhere you want it to be. However, the alignment has to be set after the ride-height is established. The cons of a mon-factory height are.;
1) that if the ride height gets to be too low, the lower bumpstops will pound out; and
2) your camber change may become exaggerated, which causes an exaggerated toe-change, with suspension travel, which leads to wandering in a straight-line. The only way to see exactly where you are is to have your alignment guy map it out. Once you have the map, you can generate a ride-height window, and set it anywhere in or close to, the center of the window. Thus you will have wander-free cruising, hopefully ...... depending how loosey-goosey the rest of the suspension and steering are.
The point is this,
To me, the rear ride height looks fine.
To me, the front looks wonky.
