Tough call. Spindles, A-arms and springs are still readily available since nothing ever goes wrong with them. The upper and especially the lower trunnions are the weak spots. The lower bolts tend to gulley out after 60 years and will give way, causing your wheel to become unattached to the lower A-arm. Bolts are not readily available, although a west coast member is now looking into reproducing them.
There are essentially two different lower trunnions and bolts: the smaller ones for the 1952, 1953 and very early 1954 Aeros; and the larger trunnions and bolts for the Kaiser-226 engined cars from 1954 and 1955. Not sure, but I believe the uppers stayed the same throughout all the years, but I will have to verify that with the parts book (more on that when I find my book). Examine the bolts closely and replace if they show any signs of "gulleying."
John Parker had a good stock of them and Rudy Phillips bought out his inventory when he retired. Rudy may still have them.
Rubber bushings can be pressed into the A-arms as needed except for early Larks, which had "solid-block" mounting, meaning the bushings were metal, perhaps bronze. The later, larger front ends were better and safer and they will just bolt up in place of the earlier models.
