to run the 600, you could eliminate the msd box.
You would need to lock out the stock distributor, or get one with no advance.
the HEI comment above is incorrect.
1. HEI distributors replace a brain box...whether it be oem or cdi style
2. an hei distributor will NOT work with the timing control on the fitech.
if you read back a few pages i get into more detail about all of this.
pretend your starting with a 100% oem mopar.
using the 600 eliminates the need for any brain/cdi box and ballast resistor. But the locking the the distributor is required (or i think the guys have figured out a lean burn distributor comes this way out of the box)
does that clear it all up?