Input for 340 upgrades

My head is swimming from reading so many articles. My initial intentions were the 3 G's look Good, sound Good, run like a bat outtake hell Good.
Thought of turbo's, & the like to eat some of the modern fast rides up.
Time & huge cost are fading some what. Let me introduce my baby & current plans.
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My 72 Dodge Dart:
Stock 69 340 bored 30 over
Blue printed & balanced yrs back.
750 DP Demon carb
727 trans w/ 3500 TC, manual
shift body and GV overdrive
8 3/4 rear w/ 355 pos or 391 pos
Stiffer axels
The old 484 purple shaft cam
MSD distributor & 6 AL
Minitubed
What I plan to ADD,
Edlebrock aluminium heads 60179
Edlebrock intake 7576
A new cam shaft ( undetermined )
Replace old headers w/ new Doug's H
All the above I do have
I know I could go bonkers with porting heads $, roller cam $, ect. ect.
My intent was a street rod that runs
10's & gets 20 miles to the gallon.
Pipe dreams are fun. Meanwhile back in reality, I might hit a drag strip for fun. Thought I wanted major HP.
But would be hard on the street.
Wondering if a boat load of tork would fit the bill in the event I'm at a light with a new Camero & to leave it in my wake. One thing I like with it's trade offs is the 3500 TC. It's fun but, even with the 355's & OD my RPM's are under the stall speed generating heat I'm sure. I do have a trans cooler but the idea of constant slippage is bothersome.
So, without porting heads, roller cam's with the mega spring pressure's hammering the valves, I humbly ask for your advice for a cam, possible TC change? A combination that would utilize the engine with the added parts
And get up & go. I appreciate the knowledge & experience so many of
You have, look forward to any input or advice.
I would not change what you have, but if you have to get yourself a HellCat crate engine couple that to a manual 5 speed and go have fun.