Quote Originally Posted by rs_sleeper
90-94 1g n/t: 4g63
90-94 1g turbo: 4g63t 6 bolt
95-99 2g n/t: 420a
95-99 2g turbo: 4g63 7 bolt
Almost

90-94 N/T either a 4G61 or a 4G63
90-91 Turbo 4G63T 6-bolt
92-94 Turbo 4G63T 7-bolt
95-99 N/T 420A
95-99 Turbo 4G63T 7-bolt
96-99 Spyder N/T 4G64
96-99 Spyder Turbo 4G63T

http://members.shaw.ca/costall/1000Q...atkindofengine