This could explain the blowing out the front, as you would be shocked at how much air those blades throw to the sides as well as back toward the motor.
Being too deep in the shroud very well could be forcing a bunch of air forward.
Good call there MOPAROFFICIAL.:D
To the OP
The vinegar in the radiator works pretty well, but don't forget the block itself.
The same vinegar soak and flush also works there, and I'll even drive the car for a couple of hours around doing chores or grocery shopping with the vinegar water mix in it.
My favorite method for flushing a block in the car is to use a water hose and compressed air both at the same time. (and the more air pressure the better on the block flush)
The blast of air along with the water causes a high speed blast of air/water mix to blow through the block WAY faster than the coolant ever travels, and doing it through the stat opening is forcing it backwards of the normal flow so it really carries the junk out.
Put both in your thermostat opening without the stat, wrap a wet towel around the hose and air chuck both and hold it there tight.
Let about 5 seconds of water go in and then hit the air until mostly air comes out the bottom hose outlet of the water pump.
I repeat this about 5-6 times or until I get clear water coming out with each blast.
It works well on radiators as well, but you have to be a little conservative about how much air pressure you use as to not split a cooling tube.
Same with backflushing the heater core since they all share the same cruddy coolant.
