Trying to organize my Dads parts, how can I tell Model T vs Model A front/rear springs apart?
Model A's are about 1/4 inch wider, or just simply the A springs are wider then the T.
A quick way to tell is to look near the spring eye. A model T spring has an oil hole drilled on the top of the leaf to oil the spring eye. The model A spring does not. It was lubricated with grease from the shackle.
Model T springs didn't get the oil holes until 1918, so there may be a year or so with clipped Model T front springs without oil holes? Earlier tapered springs should be even easier to tell apart from "A" springs
Besides the different width of the leafs and thus more strength in the "A" springs there is a difference in shape in rear springs.
It can be seen in this picture that shows repro springs - but it's about the same with originals
The "T" rear springs has more of a "bent leg" look to them while the "A" rear spring is more of a U with only slightly bent legs