I'm not sure what exactly is under your field, but all the molex connectors I've rebuilt, I did one circuit at a time with regular .156 pins or trifurcons for GI or power busses and grounds. I don't replace housings unless they show heat fatigue or worse. Now, if you're doing it for cosmetic reasons and want everything to be a brilliant white (even connectors under the field you never see) replace 'em.