New member- question on engine swap..

Hello, im new to this form. My first question is on my 83 320, im looking to swap out the 1.8 for a 2.6 from a e30 donar car. I know they did this with the 323, but just how big of a project am i going to be taking on here. Any good sites that have done this swap. Any help would be great. Thanks.

The engine mounts dont line up. Also the tranny's are different. You might be better just buying a 320,323, or a 325 and working from there.