I am restoring a 1962 impala for the second time. It was a sport coupe but a friend was junking his 62 SS and gave me all the SS parts. Originally a the car was a 289 with a power glide transmission. I redid the drivetrain with a bored and balanced 1965 327, backed by a muncie M21 and 1964 posi. The combination is great, but I have always wanted a 409. I now have a 511 hp bored and stroked 409 to go in it. I am planning on keeping the muncie and the posi. I am looking for some help in making this new combination work.