Hey guys I'd go to a mazda forum, but they are honestly not fun to deal with. My friend owns a speed3 and a regular 3, both are gen 1. He bent a rod in his speed3 and 3 months ago he was t-boned by a car running a stop sign. Simple question really. How possible is it to put the NA engine from the regular 3 into his speed3? As far as I know youd need to change fuel pumps and oil pumps/lines probably. It is not our first swap, but we have only gone from NA to boosted not the other way around. If anyone could shed light on this it would be greatfully appreciated. Also, its not to be kept we are going to rebuild his speed3 engine from the bottom up for big turbo so in the meantime he just wants to drive it.