LT1 Edit or Tunercat
They both offer similar functionality. Either one does the job well.
I've run almost every version in between. I work on more than just LT1's - and Tunercat's the best editor (IMO) for that. LT1Edit won't support Tuned Port cars, Throttle Body Injected cars, 92-93 LT1's, etc. - but I burn chips for them with Tunercat.
I'll be firing it up hopefully this week to start tweaking on my TBI-equipped 79Z (just idling in my shop, it runs so rich it made my eyes tear up and I had to stop the motor).I'm running whatever the current release on his web site is. 2.0 or something like that.



