Any way to get more caster adjustment without newer adjustable CA?
i think early and late strut rods differ slightly.For those who have replaced their
originals with the wrong ones it may create a caster problem
They do. They use different thickness bushings, so the shoulders and lengths of the strut rods are not the same. If the strut rods are paired with their correct bushings, the effective length of the strut rod is the same. So, what you can't do is use early bushings on a later strut rod or vice versa, that changes the effective length. You can use later strut rods on an earlier car IF you use the later bushings as well. Or earlier strut rods on a later car if you use the early bushing style.
Not all the aftermarket bushings are the same thickness as their respective originals either, so you can unintentionally change the effective length of the strut rod even if you use the "right" bushings if they're not a good match to the OE specs.
Which are all reasons I use adjustable strut rods. As the modifications add up (poly bushings, gusseted K members, tubular UCA's, etc) the length that the strut rods need to be to prevent binding can change, and the only way to be sure is to set the length, check for binding and repeat until it works. Or as jbc426 suggested, install the stock strut rods and check for binding, and then alter the bushings to get the right effective length for your car.