bboysake

Hey guys i don't know if this is the right thread but here's my situation....so I did a bunch of research for almost 2 weeks now. I can't find anything, or maybe I'm just not searching for the right keywords, but here's my situation
I have a chipped p74 ecu obd1 on chrome and I got a good deal on this ls-vtec motor that's obd2, pr3 and obd2 ls block to be exact..

my question is should i just get a jumper harness to run the obd2 motor? And since a guy already ran it for a bit, would I need to switch over anything? I'm completely lost on what to do any help i would appreciate since I'm pretty new to the scene