1st I believe the obd1 has 'DOHC' bigger than 'VTEC' on the valve cover, and obd2 has it the other way around...... I BELIEVE. But don't rely on that. If not, the dizzy caps are different. Someone who knows will come and tell you. Then there's the ecu itself. You can google this for pics of the 2 different types ( there 2 for obd2, a and b), Quickest way to identify, the obd2a and 2b each has 3 plugs for 4 sockets, once's always blank. With the obd1 there's no blank space.
Check Paul if you want. 733-5217. Would do the swap like any mechanic would, but he's a boss with the wiring.
obd1 business
obd2 business (note the blank space)
