You need to find a shop that has a scanner that can read your abs module. You have to know what the module is seeing that it does not like in order to know where to start diagnosing your problem. I am a master tech at a Brake Masters I do lots of abs diagnostics.
i went and pulled my old 13g out of the garage and It looks just like the one from my 13g it has the same markings on the side so i would say yes its a td04.
Thats why I said to remove the rocker arms so you are only left with the cams and bearing caps If they still will not turn its a problem with one of the two most likely the bearing caps.
First I would take the rocker arms out and see if the cams are able to turn, if not I would look at a problem with your bearing caps or the cams. If they do turn I would check your valve lifters and make sure they were bled and that there are not shims under them unless your cams require the shims.
I was having the same condition with my 92. I just changed my knock sensor about a week ago and no more problem at all. Just look under the intake manifold with a light and try to see if there is any black goo melting out of it. If so change it.