got a issue with my 355

[Silent viewer]

its back..... i swear it seams like a timing issue, seems to be fine in park but once in gear it is rough.

 

[megaladon6]

2 very common problems that cause those exact symptons, including getting better after filling up, a hole in the pickup tube that pulls air when the level goes below it, and crap in the tank plugging the sock.

 

[pontiacgp]

its back..... i swear it seams like a timing issue, seems to be fine in park but once in gear it is rough.

have you removed your distributor cap to check the springs on the weights....I'd be trying a different modulator as well...