Turbo....

no I can't, on account of I have no experience.
But IMO, I don't think your being fair;
the question I would put forth is this;
Suppose your system was under the hood in the usual place, and NOT running an intercooler. What might be the charge temp?
Now run the plumbing for the intercooler but substitute a 15foot X3inch aluminum tube (or however long your current piping is), in it's place; what might be the new charge temp?
And finally, install the intercooler and generate the final temp.
In your story, you left out the first part, for obvious reasons, I can see that. But what if.

As to turbocharging, I can only parrot what smarter men than me have to say.

As for myself; If I owned an Early-A and got the urge to turbo it, I would try to run a water/meth injection system before I would run an intercooler hung off the front.
But before that, I would for sure at least try a remote, and possibly a 2-stage; that's my dream BTW,lol. Not for mega-power, cuz there is no way to harness that on the street anyway, in a stock-body Early-A, lol. But for two things; 1) the cool factor, and 2) tire shredding torque just off idle.
In my dream, I would run a small turbo under the hood just to get the ball rolling, and feed the exhaust from it, along with an exhaust bypass, out to a bigger turbo out back.
My intercooler(s) would be disguised as LakerPipe(s) sending the charge-air back to the front. Hey, it's my dream,lol.
Sounds like i ruffled your feathers a little. I certainly didn’t mean to. My question was meant to ask you what a 2 stage system is. It sounds like you mean a compound system. If so those are used mainly to generate very high pressure ratios and lots and lots of “map width”. The diesel puller guys love em. And they are making sometimes 200 or more psi with compound triples, (2 small twins feeding a monster). There are not a lot of successful gas engines running compound setups. The boost gets out of hand very quickly. So I’ll ask again is that what you meant by 2 stage? And to the first part of your reply, I gave you a direct first hand experience of running a remote mount turbo on my personal vehicle with ~14 feet of tube and no intercooler and then with an intercooler and gave you the temps from my data logs. It’s about as fair (and accurate) as anyone can be I don’t get it.