69 Early to late 76 steering box swap , easy ?

Hey! I'm an aftermarket parts seller! Well, actually, just a guy in a parts store.
I'm in the middle of a similar swap. I carefully adjusted my new tie rods exactly the same length as the old ones BEFORE I realized the center links were different. Talk about toe in.
The adjuster sleeve length has to be the problem, as in, they're too long, and he's running out of thread on the ends, and can't thread them in far enough to set the toe properly. At least, that what I'm reading into this thread.