hello guys iam at my wits end with this swap,maybe you guys can help me out .
I have an 2018 l86/8l90e ,I installed a btr gen v stage3 cam ,a cirlcle D converter, long tube headers ,cold air intake.my first issue is that I cant get this thing to idle ,and when it does it will only do it for a few seconds .my second issue is that my when I try and drive it the transmission will shift fine but will not down shift or unlock the converter. any help will be greatly appreciated .

c10 transhp tune.hpt