Also, if you plan to buy an OBD1 ECU and jumper harness, you'll want to solder the leads to the jumper harness, as to not have to slice and dice your dash harness, especially if you ever want to take it out for warranty work, or just take it out period. This also is adventageous in the respect that you can do all the soldering in your lap, rather than under your dash, unarguably easier....

Later,
Aj