To the OP, yes the 347 will fit, just like any other 302/5.0 conversion(I have one in my 84). The stroker comes frome internal mods of the engine. The 8.8 will hold up to the power coming from the 347, I use mine for wheeling (it is locked) and havent had any issues with it. I have 68 heads on mine (smaller combustion chambers= higher compression), and its bored 40 over(had a good scratch in one cylinder wall) so its a little hotter than just a regular stroker.
Pic of the 347 before install
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As far as the D35 I have that too, and as long as your using your head, it will hold up as well(mines locked as well).