ngale65
Member
Have a 65 impala, factory 409 340hp with an automatic. Original paint unrestored car. Plan is as follows. Currently putting together a 409 bored 60 over with a stroker crank. should push 550hp on pump gas with no issues. Planning to put a wide ratio 4 speed in the car. Question is what ratio rear end gear to run. I don't care about racing the car. highway is important as we drive the car, not into trailer queens. I'm thinking a 3.42 but open to advice. Last car I built was way to radical for the street with a 3.73 and a 496 big block with a 4 speed.