Opinion needed on mods

[Texican]

Ok so I am looking for some clarity as to what I can do as for as pulley without a tune.

Now I know its a must to get tuned or a pcm. But what I have read about KR I'm wondering if a meth injection kit would help, now this is just for Ideas, my mods currently are:
180° T-stat
Shift Kit
Headers
3" catless Downpipe
DIY Cold Air Intake

Now I am wondering what size pulley would you guys run, I am eventually going to buy a pulley and get tuned at same time but would a meth kit be sufficient without the tune?

Just me thinking, any opinions welcome as long as constructive

Thanks

[MoarkatsINmuhtrailer]

You need a tune with meth.

[Texican]

Could I run a 3.3 or 3.4 pulley safely with these mods? With tune of course

[REDCRAPGP]

What year and 3.3-3.4 is pushing it without a cam or IC and especially without a thne

[Nickell]

the car would be happier with a 3.5 or 3.6

[dsmuts]

I ran untuned with headers and a 3.4 and it was fine. I then added a zzp 1.0 pcm and it had more KR so I added modded 1.9's then.

[Texican]

Its an 01 regal with 25k on rebuild