When you feel the need for speed, there is only one cure. Against doctor’s orders, this Fiero owner decided to visit the quarter-mile track to see what his 427 LSx powered Fiero could do. On his third go he managed a 10.5 at 129 mph. The engine started off as a 6.2L L92 which was stroked to 7.0L and has a L76 intake. Mated to the engine is a 2007 Impala 4T65E HD transaxle with 3:29 gears.
Source: LS1Tech