b18 swap into an 88-91 crx and the difficulties

[b18cDx]

I recently lost my eg hatch to a car accident. I am now looking around for other crx's or cheap eg hatchbacks. one of the questions i have is regarding the difficulty of swapping a gsr motor into a 88-91 crx (SI or HF). I know in eg's its direct bolt up providing you have the right mounts, wiring harness, ecu, ect. which i happen to have. I understand that in 88-81 HF model crx's the axle splines are smaller then the B series transmission so swapping hubs is a must for such an app. I was wondering if I would come across this same problem with an SI crx. and was also wondering if there are any other problems I may come accross in the process. Im almost sure a question like this has been asked before and Im sorry if it has. please take the time to respond to this post any one of knowledge in such an application would help me greatly. thanks