Hi obrut,
With the list of modifications you've listed, just with headers and camshafts alone the engine is definitely going to flow much better. The stock intercooler should be able to handle the PSI but will be more restrictive for the modifications.
have you considered the RarlyL8 intercooler? It's one inch taller for more flow
https://www.pelicanparts.com/More_Info/RL930INTC.htm?pn=RL-930-INTC&bt=Y&fs=0&SVSVSI=812
or better yet there is a FabSpeed intercooler which is marketed for the K27 turbo
https://www.pelicanparts.com/More_Info/PELFSPOR911TICK27.htm?pn=PEL-FS-POR-911T-ICK27&bt=Y&fs=0&SVSVSI=812