p75 b18b1 head, pr4 intake, td-55u distributor
 

I bought a used b18b1 engine off Craigslist. The block is from like a 92, I'm thinking most the parts are original and someone down the line changed the head with a 96' p75 non vtec. I'm doing a swap and wondering if I have to get a pr4 or p75 ecu, or does it really matter.