I cured my fitment issue by drilling the downpipe mounting holes to the next sae size. A little bit of movement at the turbo adds up to a lot of movement at the hvac box.Fini! Took out gasket and tightened up everything at most favorable position. Got it to point I can slide a piece of 1/4-20 all thread thru with slight budging. Good enough for who it's for!
I see many in this community who never ring out their current turbo and switch to a bigger one in search of more power. The bigger turbo now has to blow through the same restrictive engine as the smaller turbo did. Now the new problem is the inability to run lower boost numbers. Then modifications are done to allow lower boost. There is another way to fix the problem and that is to run more boost.One things for sure, going from a TA-49 to a PT6466 with a THDP, you have a lot of wastegate hole porting, contouring and blending ahead of you.