If you are going to be dropping the B16 into an EK all you need is the Rear Tranny Bracket and Driver Side Post Mount off a 99-00 Civic Si. You can use your Stock D-Series Engine Mounts.

BTW, if the B16 has the Post Mount mounted to the Block already you dont need it. All B16 Post Mounts are the same. Now if it has a B18 Post Mount you need to change it for a 99-00 Si one.