very good man!
Its turning out to be a great read here

One my 97 5.2 I looked down the throttle body and could that the bottom of the plenum was wet with oil. Installed a set of Felpro gaskets and has been good since.

I was about to say this... It's the best way to check for blown plenum gasket. Look down the throttle body for oil puddled on bottom of intake.

Oil consumption is a good sign,but you don't know if your consumption is an external leak, valve seals, worn out rings, stuck open PCV, or blown plenum.

Great Info,
on the hot air issue, I wonder if the M1 intake would help out with that problem..

For a Durango that's not going to probably tow a whole lot I'd look at the Hughes Engines Edelbrock Air Gap set up they have for the Magnums. You lose low end torque, but gain some upper end hp and get away from the plenum gasket issue

The m1 single plane gives up tons of TQ the Hughes gives up a significant amount but not as bad as the M1. IAT deffinately runs cooler and pinging quits with those two intake but the runners are not long enough to make that great off idle TQ the beer barrel does. I done both on stock engines and the low end bites in a Ram 2500 and the top end did not justify the loss down low.

The beer barrel cuts off about 4500 RPM, I had one in my R/T and that was about where it quit, did an awesome long tube headers and 3 inch exhaust mandrel bent with an X pipe and it barely made a difference, then added a hughes air gap and it would pull with a stock cam clean to 5500.

If you are not doing the intake AND exhaust you will not see much difference but do em together and look out.

Thanks Guys, I don't plan on towing much, lawn mower, small things etc.
Mainly my people mover...

Even on otherwise stock engines, I've not heard anyone complain about the M1 intakes, and with more than enough torque to blow the tires off in smoke...there was no way to know for sure if there was any loss in low end.

Now, that is with the R/T crowd who does not tow with their trucks, so the results could very well be opposite in a full size truck that tows a significant amount of weight.

You can add an M1 without retuning the engine and it will run ok, but you can run SCT even on a bone stock engine and pick up power and mileage. With a stock engine or nearly stock, you can run "canned" tunes and not have to worry about custom tuning from running different heads, cams, strokers, etc.