3.1 engine swap [Archive] - GrandAmGT.com Forum GrandAmGT.com Forum > GAGT - Technical - Sponsored by www.MilzyMotorSports.com > Technical Q&A > 3.1 engine swap PDA View Full Version : 3.1 engine swap rseibenick02-17-2004, 08:10 PMhave a3.1 98 grand am engine and 4 speed auto. body shot. can this swapped into 94 to 98 grand ams with little trouble. and do i need to swap the ecu computer. thanks Ron. vBulletin® v3.7.2, Copyright ©2000-2018, Jelsoft Enterprises Ltd.