Just put in the 383.
Want to verify the grounds. Where are all the grounds?
One ground cable is the body one, flat copper.

Help!
Thanks.

 

The only grounds I had to hook back up after having my engine out were the ones on the coil, from coil to LH frame rail (braided), the one by the knock sensor below #6 plug and battery cable ground on the front bolt of the RH motor mount bracket.

 

Shoebox,
Please explain the one to #6 that one isn't ringing bells....

 

Small stud for blk/wht wire from the harness that has the purple starter wire and knock sensor.

 

Thanks Shoebox

I am getting a backfire through the intake and was told that not having the grounds right might do it.

I know the opti is on right.
The timing gear should be set up right.....

hmmmmm

 

im getting the same thing... is there a way to test to make sure the pcm ground is actually grounding it

 

The best way to do it is to find the pinout diagram for the ECM, remove the harness plug from the ECM and then check continuity to ground at that point.