i broke my d15 16 valve bottom end
i have a d16y5 engine to replace it
can i just put my d15 head and intake on the d16y5
to avoid vtec issues for now and use all the original crx ecu/wiring harness?
or do i have to use the D16Y5 head?

 

yes

 

im not sure what you mean.
can i put the D15 head on the D16Y5 engine

OR

Do I have to use the D16Y5 head that is now on the D16 engine?

 

You can use whatever D head you like.