If u have an Aode tranny then go for 4.10s with a good converter like boostplenty said. Then pullies off-road h and timing adj. That should yield to low 14s. But any big gains u better have some deep pockets. Just look for a set of heads first if your gonna keep the car for awhile.Preferably some DOHCers! Hey Jomar whats up with project fox/modular? -Mark