Nuke pipeline with hdr delivery

Hi

Working on a full cg spot. All 16-bit linear exr. Comping in nuke in its default color space.

Just found out client would also like an hdr delivery. Only specifics on the hdr delivery is

pq1000nits

rec2020

What would our write node output be?

Is there a way to output this if your are not working in aces or is it better to convert our nuke setup to aces?

Any insight would be much appreciated.