Cv8

Hi guys i have a cv8 monaro 03
i had a tune done and its stalling all the time please some info would be great
it has
228/234 cam with 113 lift
Double valve springs
try y extractors twin system 2.5
Interceptor plug and play adjustable shift kit
4000 g stally
Maffless tune
otr
and a unichip
(only got 348.9 wrhp)
and doing only 14.3 qurter mile

after the tune the stalling got worse
and wile ******* around under the dash i found this unichip and spoken to some tuners all say that the unichip is fighting the tune but later on i found that one cat had been gutted so now in thinking that along with the chip the left bank had more compression then the right hence the stalling i now have to pay for another tune and have the unichip removed
and she hit limiter at about 150/160 between 2nd and 3rd (real bad)

now on to the next part
in the last tune i was asked what i want from it eg fuel economy or power so i said
some fuel economy
dont want it to hunt

but now for the next tune i want
no fuel economy max power
hunt off its *****
and i want the 02 removed from the pcm
any info would be great fellow ls lovers