yes, if I wasn't already a boost junky I'd leave the ECM alone - and ideally I'd retain it for non=boost driving. That's been the hardest part about the EFI on my 383. Dialing in WOT is 'simple', dialing in the 1000's of different everyday driving scenarios is difficult and takes time. Mine drives fine but cold start hiccups a bit and I'm throwing mpg away I know just because I haven't had the 1000's of hrs to drive and tune like the OEM ECM's get.