Still having problems making boost

[I ask good questions]

I built myself a boost leak tester and pressurized my system. Found a few hoses that were still leaking. I also fixed my exhaust leak. My car still stumbles and spits and sputters when i give it just a slight bit too much throttle. It makes drivibility hard. At one time i had a hotpipe that had a nipple welded for the wastegate actuator line and when i replaced my hotpipe i had to move that vacuum line. Could I have T'd into a wrong line? My BOV is also ran off of that same line. I am really getting annoyed with everything. I am very adamant about fixing it. Could it be timing, tps, spark plugs gapped wrong. I dont think i am running lean because it backfires between gear changes frequently and has been known to throw a nice flame on the interstate. So can someone tell me what the **** the problem is with my car?

[I ask good questions]

here is where i attached the vacuum line

[fregisr]

the top nipples on the throttle body is vacuum and the bottom is pressure. BOV goes to the bigger one on the top. You can source your waste gate at the bottom one but be careful bc you will be boosting around 12~13psi so make sure you have the supporting mods