Do you mean the 3.3/3.5/3.8 family?...Firstly,.....Why,.....Secondly,Detroit just needed a slap ina back of the head to make em spend a little money on R and D to make our beloved V8's more efficient.
The 3.8 L and 3.3 L are one family. They are a pushrod v-6.
The 3.5 was a dual overhead cam engine and later they made the 3.2 L and a 4.0 L off of it because customers were not happy with the power of the 3.5 L.
Keep in mind, whatever engine you try to use, all of the production engines dyno'ed 20 - 30 HP LESS THAN ADVERTISED! I used to see/review the weekly dyno pulls for these engines.
