[George Miller]

I think you will find all Model A's have a little deceleration vibration, all through not that bad. My take is on acceleration the forces push down on the front engine mount. On deceleration it lifts on the front of the engine because the engine is acting as a brake. plus the forces inside the engine reveres.

I have found if the front engine mount is to tight, it will make it worse. Now if you have a bad U joint or some other problem then that is a different deal.

I know a lot of you will not buy this but that is ok. Study how the engine drive train work together.