Re: 13B TII vs N/A
 

I drove my '86 n/a with all emissions removed. It ran fine. Back pressure tube was left on, charcoal canister was left on. I also had pineapple racing aux port sleeve inserts, and modded the throttle body.

The mod that had the most negative impact was the throttle body mod. Lots of funky idle issues.

Re: 13B TII vs N/A
 

im more leaning to racing beat headers and cat back (so no cats and with no cats i can remove the air tube and egr) no air pump or evap canister to clean up the passenger side of the engine compartment

Re: 13B TII vs N/A
 

The auxiliary ports need a way to open. On your, that happens with back pressure, using the tube.

The evap canister doesn't take up much space, weighs very little, and without it you'll smell gas fumes all the time.