Slant 6 Turbo 68Dart Project

I'm still working it out. Even though it seems simple because there's only one way to hook it up, I believe I am somehow doing something wrong with the wastegate or blow off valve, in that one or the other is constantly letting off pressure (or both).

I can drive it around easy enough and the car is all well and driveable now, and with the fixing of the vacuum leaks the turbo whine is now gone - it's non-existant, but I took the filter off and you can watch the turbo spool at low RPM, and then it accelerates dramatically if you push the throttle, so I know the turbo is ok. I am getting some exhaust blow-out from between the intake and exhaust manifolds where they meet. I have it bolted down tight, but it still seems to be letting exhaust escape. Not much - but enough to notice warm air blowing slightly. I am debating a way to remedy this. I was thinking maybe a large hose strap across borth manifolds to lock them together for good just to see if that does anything. Otherwise I'm at a loss for what to do about it. I've tried RTV in the past for this situation but it just gets blown out after a few cycles.

My gauge is reading 0 now, or rather, on a run, it will start at -1 (somewhere on the vacuum side) and then go to 0-1. Still not much of anything and I have the gauge tapped directly off the turbo/ wastegate line, so it should read SOMETHING being that close to the turbo. I don't know. It's kind of frustrating right now being that it drives so beautifully but I can't tell what's going on with the pressure, and yeah - I mashed on it on the freeway. Nada.