If its a paddock basher try it without it, being the peice of crapolla it is, i could 't see the pcm relying on the o2 sensor feedback all that much i may ran a little funny and you might get a light but worst comes to worst drill a hole tap it and bam
If its a fully sick street car then you may want to take it to a shop ( i dunno how handy you are with a welder mate )
Or run the zorst straight out the block