Originally Posted by JDMS1eeper
PM SOHC_Mshue on here, he had a guy do the same thing to his WRX turbo and made a custom flange area on his cast HF manifold to fit his tial 35mm wastegate. Did a great job, you shoudl look him up and ask him about it. His name is Matt SHue and his screen name is Shuebrt2 on AIM / AOL.
Yea James from Weldone over on patterson did a great job with my turbo. Not quite the same thing as you want. He just plasma cut out the whole internal gate assembly in my turbo and then welded the hole shut completely, then he modified my hf mani to accept an external wastegate. He does a great job welding just about any metal and fabricating things with metal so i'm sure he would do a great job.
Here is a pic of what he did on my manifold
