that hole isnt a bleed hole its where the pin for the servo goes on the other side it has to be blocked or it will dump line pressure you should have got the correct one from fairbanks instead of welding because what if the weld doesnt hold?did you reinstall with the check ball that goe in the servo body?
05 tahoe z71 ,6.0 LQ9,gmpp l92 heads, 42lb inj.,08 ls3 intake,90mm tb ,nos 150 shot, mild port job ,comp cam, comp 918 lsx new style springs,titanium retainers and keepers,x link, headers, magnaflow s.s cat back 6.0 y pipes ,e fans,aem brute force intake,22s nitto 420s 305 45 22,3.73 auburn posi,yank dual clutch 2800 stall ,custom stage 3 trans by V&O TRANSMISSION,nelson tuned,granetelli wires,2 alpine 12s, alpine amp ,pioneer avic d3 nav