School me on torque/stall converter + issues!

[BloodMoon]

Sorry for the long post but I have a lot to ask... And I don't know which of these details matter, but here is everything I can think of so you can pick and choose what info you find important to my issues?

I understand how torque converters work internally, but have concerns about what or if I should swap too?
It was recommended to me to put in a torque converter around 2400/2700 (your recommendations?)

Uses: First things first, this Beast is a TOY, it is driven regularly, used for towing, and played with offroad, soft sand, fire trails, river crossing, and crawling of the occasional gas sipping hybrid...

Here is the setup:
Engine 383 (Compression 9:1)
Transmission 350 3 Speed Auto
Transfer Case NP203
Torques/Horse 420/420
Tires 35"
Carb Edelbrock Performer, 600 cfm, 4-Barrel
Intake Manifold Eelbrock Performer EPS, Dual Plane
Axle Ratios 3.73:1 Should I change these? What to?

Cam Specs:
Lift = 488/488
Duration @ .050 = 232/234
Lobe separation = 108

Performance:
Engine was dynoed, all Torque and Horse Power is produced by 3000RPM, and stays pretty consistent after that with minimal dropping.

MPH / RPM (please bare with me as this is from memory)
30 / 1400
40 / 1500
60-65 / 25-2600
70 / 27-2800
80 / 28+

Issues trying to fix:
1: Idles at 880-900 in park, drops down to 580-600 in gear; if it gets close to or lower than 530 it starts to rattle the truck, and even try to stall if low enough.

2: hard acceleration from a stop, it sometimes bogs down quite a bit until the RPM/MPH get high enough then it really takes off. too much or too little fuel? lower rpm than the power curve due to resistance?

3. city driving, constant stop and go; it seems the engine starts to get over loaded with fuel and starts to bog down while idling in gear at a stop or low rpm decelleration? Recently started from what I noticed, after I removed a crappy fuel filter that was between the pump and carb. Excess fuel? I think the idle air/fuel mix may need adjusting? how?

Here is my confusion about torque/stall converter:
I thought that if I am driving 40 mph and 1500 rpm now and I put in a higher stall speed (2200 for example) that the rpm will be a little higher than what it is now, but it will be slipping? causing excess heat? because it does not lock until 2200?

But I have been told that a TC will change the RPM at which it drives? so my 40 mph at 1500 rpm, will become 2200 rpm and it won't be slipping?

If I have missed a detail that might help, please let me know, and thanks for staying with me for these long winded "questions".

 

[Greg Ducato]

Got any cam specs? duration at .050 and lobe separation?

 

[sponsoredbydad]

I would be looking at gearing not torque converter. Who ever told you a 24/27 converter was right for that engine would be wrong in my opinion. All your power by 3000 and steady . says to me you want an converter that gets the vehicle moving earlier in the rpm range.
There is more to it with cam specs, type of manifold, carb size, tire size even comes into play but I'm not an expert in this area. My 2 cents is saying gearing. maybe like 410's would be a nice middle ground gearing for that motor

 

[sweetk30]

x2 on 3.73 with th350 gear ratios and trying to turn 35" tires = blaa . it works but is a big crutch .

but also a matched system such as the convertor will help some . greg knows his stuff answer his questions .

 

[BloodMoon]

Got any cam specs? duration at .050 and lobe separation?

Lift = 488/488
Duration @ .050 = 232/234
Lobe separation = 108

I would be looking at gearing not torque converter. Who ever told you a 24/27 converter was right for that engine would be wrong in my opinion. All your power by 3000 and steady . says to me you want an converter that gets the vehicle moving earlier in the rpm range.
There is more to it with cam specs, type of manifold, carb size, tire size even comes into play but I'm not an expert in this area. My 2 cents is saying gearing. maybe like 410's would be a nice middle ground gearing for that motor

x2 on 3.73 with th350 gear ratios and trying to turn 35" tires = blaa . it works but is a big crutch .

but also a matched system such as the convertor will help some . greg knows his stuff answer his questions .

I was able to verify, he recommends a max stall of 2400.

The carb is a edelbrock Performer, 600 cfm, 4-Barrel.

The intake manifold is a edelbrock Performer EPS, Dual Plane,

If I did gears, how would that affect freeway driving?

Did I miss anything?

Thanks again folks!