You don't need to weld or get an adapter, Get some stuff like j&b weld it comes in atube fill the holes let sit for a day to get fully cured match use the 2.3 gasket mark your holes with a sharpie drill and bolt up you have to play the the linkage and set it up move bracket back.
Also get a dremal much help the little stub on the tb where it needs to hookyou need to round off take your time and viola!!!
Theres a post i posted pics with my 3"" pvc intake if you need more let me know i'll E-mail ya some..