If it happens when you get off and on the gas I would look at the motor mounts and trans mount. Just because it happened after you redid the front end doesn't necessarily mean it's front suspension related.
Boy, aint THIS the truth... Many times in the past I have had something conk out moments after doing something else unrelated.
I rotated the tires, now I have bad breath. I should have left the tires where they were.
