I am confused by your post.
What is the rod journal size for your rods?
Did he press out the old bushing, enlarge the hole and press in a new bushing? Or did he bore the existing bushing to the new size? Is there any bushing in the rod right now?
Are you intending to use floating pins or pressed pins?
Are you sure the rod is 6.358? A 0.250 longer bigblock chevy rod is 6.385, pretty common for use in 3.75" stroke B strokers.
The selection of aftermarket 6.358 rods is pretty slim. However, 6.385 rods are falling out of trees right and left.

427 chevy engines worked pretty well with a 6.135" rod and a 3.76" stroke. 400 chevy enginescame with a 5.565" rod and a 3.75" stroke and seem to run really well with a 5.7" rod on a 3.75" stroke. So a 6.358 or 6.385" rod on a 3.75" stroke looks pretty good from here. Even on a 3.91" stoke it looks pretty good.

I have given up my "long rod religion"
as I'm not building or dreaming NASCAR engines. I'm sorry, Smokey.

R.