Lemarin, please,where do you live? So,if a memeber wants you to have something we know how far for shipping.
Consider these: Are you prepared to move the A/C compressor back to the driver's side?
I may be corrected, but I believe LM1 air cleaner lid is painted (black) and only the SS (L48) had the chrome lid, you speak of. Going by memory, but you know how that goes.
If you could clarify your desire about originality a little better? meaning, there is "original appearing" and then there is "correct original" or date matched and details corrected that only a small percentage of car guys could ever discern. In the same order mentioned: First: Is expensive enough and time consuming and, fortunately, you can always go the repro route to save time, not sure about saving money. Second: Will be a much more time consuming and could be very expensive. In your favor though, most of the engine parts are somewhat reasonable (excepting smog related)( man trans.only) and common to many engines/(Chevys) of that era.
Cannot remember, is that an auto or stick?
Gotta say, Many guys would die to have that chromey looking, accessorized engine bay, but are stuck with (in their minds) something that looks stock and, in their eyes, pedestrian and boring, yet others like you have all the 'bling' and don't want it...isn't that how it goes? Maybe you could find someone that wants your stuff in trade for original. A lot of your parts look pricey, so,don't trade straight up,IMO, you should have some change $$ when all is done.