just trying to figure out if i can use normal b series swap mounts with the d series rhd crossmember...

 

people like to talk **** to people, but nobody can answer a real question...

 

yes as long as the rhd rear crossmember is from a d series model

 

Exactly, but just to elaborate a bit more the EF6 and EF7 JDM chassis cross members are what you are looking for. EF6 was d15 and EF7 was dohc ZC, both those chassis frame rail and mount locations were setup the same as USDM ED chassis.

In other words don't use an EF8/EF9 crossmember, along with the framerails they are set up specifically for the B16 from the factory. The EF8 has lots of differences to the chassis that most people don't know about, everything in front of the firewall is different pretty much, framerails, rad support, t-bar, mounts... I'm restoring one and I'm noticing/learning all this stuff.