So I can place catch can on firewall and move the PCV connection to the catch can (with a line leading to pre turbo instead?) (just put rubber cap over intake nipple for PCV)

No check valve would be needed as would never see PSI. Just -HG at all times.

98,6Bolt,3"EXH,LINKV3,780cc,SD,SCM61@26PSI, 340LPH,AFPR,TSBOV,REARWB,FMIC,2"RAD(20/80/WW)