1991se240sx

so i been looking into removing the AVI setup and was gona rip it out today. Checked in the "how-to" section and all that and figured out the basics, basically. so all i wanna know is............after removing the unit, jus plug the big pipe with a bolt(for now....till i can get it welded or whatever). What size bolt to use???? and for the vacuum lines or whatever, just tape them off and everything will run fine??/ no issues??? thanx a ton guys, i appriciate yalls help like u wouldnt believe

Biggamehit

iTrader: (2)

what ever size fits in there snug. with the vac.. you just buy some vac caps and plug them off.