In the scope of boating this is not a big problem, this is very basic mechanics. Whoever did the hack job and used the wrong bolts was a mechanical idiot, those ears are not meant to be clamped together. Put your new caps on, have some nice stainless bolts machined to work, line up your rod ends and you are good to go

I would put the tie bar right below the cylinder mount on the same bolt. Otherwise they could fight each other as you turn because they swing a different arc. I would get the bolt that Imco sells with their mounts and make the clevis's fit that.

Since you need new mounts anyway, I would just get Latham Mounts and all the correct hardware from them.
Then just use stock rear caps for the drives which are easy to find used.