74 Dart 318 to 383 Engine Swap Help

gears,
and higher-stall,2800
Ok: gears, 4bbl,2800TC, and headers with a free-flowing exhaust.
But I wouldn't put a cam in an LA, unless the compression was matched to it,or,if the car had like 3.91s(auto) or better.
and here's why;
With the stock 240* cam in at 110*
Static compression ratio of 8:1.
Effective stroke is 2.86 inches.
Your dynamic compression ratio is 7.04:1 .
Your dynamic cranking pressure is 135.24 PSI.
V/P (Volume to Pressure Index) is 111........................................111

Here is the same engine with decent compression matched to the factory cam
Static compression ratio of 9.1:1.
Effective stroke is 2.86 inches.
Your dynamic compression ratio is 7.99:1 .
Your dynamic cranking pressure is 159.62 PSI.
V/P (Volume to Pressure Index) is 132.........................................132 remember this for later

That's an improvement of 132/111=18.9% in low speed torque, just what a 318streeter needs. That's like a jump from 2.76gears to 3.23s. Or from 3.23s to 3.84s.

But say you put a bit of a cam in there with the stock optimistic 8/1 Scr.
Say a 252/112 cam like the 360 2bbl cam
Static compression ratio of 8.0:1.
Effective stroke is 2.78 inches.
Your dynamic compression ratio is 6.87:1 .
Your dynamic cranking pressure is 130.95 PSI.
V/P (Volume to Pressure Index) is 105........................................105
What just happened here? That's right, 105/111=94.6 you lost 5.4% of your already weak bottom end.
This 262*cam wants
Static compression ratio of 9.4:1.
Effective stroke is 2.78 inches.
Your dynamic compression ratio is 8.04:1 .
Your dynamic cranking pressure is 160.92 PSI.
V/P (Volume to Pressure Index) is 129.........................................129
But notice the bottom end is still a tad weaker than the stock cam at 9.1scr, which was 132.

But let's say you got greedy and put a 268/110 in there at 8.0Scr
Static compression ratio of 8.0:1.
Effective stroke is 2.66 inches.
Your dynamic compression ratio is 6.62:1 .
Your dynamic cranking pressure is 124.66 PSI.
V/P (Volume to Pressure Index) is 96
The ultimate what-the-heck did I do moment......................................96
What we have here is a total dog engine until the revs get up to about peak torque or I'm guessing, 3750RPM. So she's gonna want a BIG TC to get moving.
This 268*cam wants
Static compression ratio of 9.8:1.
Effective stroke is 2.66 inches.
Your dynamic compression ratio is 8.06:1 .
Your dynamic cranking pressure is 161.44 PSI.
V/P (Volume to Pressure Index) is 124..................................................124
And the bottom end is still weaker than the factory cam and 9.1 Scr, but it's something that you can deal with by using a higher stall

But Why do I harp on the VP and the bottom end?
Cuz in a 318 streeter, that should be priority one,IMO. And the reason for that is the factory rear gears, and the factory TC of about 1750. If you ditch these, then you stand a chance at performance.
But say you're stuck with 2.76s and the 1750, and 25.5inch tires.
20 mph will be about 1870rpm@5% slip. So if you don't have any torque there, like with the 268*cam/96VP cam fer instance, then you have a dog combo. Whereas the factory cam in the 9.1 engine has plenty of VP@132
So when you add all this up, to run a bigger cam, you basically might as well slam a 360 Magnum in there cuz it will do more for less money.
I mean bumping up the Scr to run a bit of a cam, leads to headwork, and a TC and gears and usually a complete 8.75 rear end plus a driveshaft. Since the trans is down, you might as well beef it up or at least freshen it up Money.money,money.
So that's why I say I wouldn't put a cam in an LA.

Furthermore, Since putting in a bit of a cam will absolutely require a bigger TC and gears, Why not just start there in the first place. If,at some future time, you decide that the teener just isn't doing it for you anymore, then at least you're ready for it.
As for me; the first thing I would do is gears.
Oh wait, I already did that once; 4.30s lol, and a 2800, and a big TQ, and TTIs and dual 3inchers all the way, And it fried the 295s. No cam no heads.