i would like to swap my 351D-V6 for a big v-6 with more power as i wabt to add an over drive see if i can get it up to 68-72MPH@3,000RPM in stead of 62MPH@3,000RPM...can the 478 be swapped in ? will tha 478 handle 3 grand ? can a 478 even be found ? 351M be a better bet?
