360 Vibration damper interchange

I would think you would have to go with a fluidamper, since that's what Larry Shepard suggests. I'm certainly no expert so I'll quote the Chrysler Engineer. " The fluidamper is the best unit for custom packages."

I have part numbers but no casting numbers. Maybe a Pro does.

For the LA 360's, 71-92, ---- there are 8 of them. For your year , 91, there are 2.

82-92 one for auto and one for manual transmission.

I have the Magnum 360 and it takes a weighted flexplate and a weighted balancer, but different weights than the LA 360.

I think Chrysler must be saying, where there is confusion, there is money to be made. Use the wrong one and we'll be selling more parts.

Now your problem might be, will the belts line up, because of the possible difference in balancer thicknesses.

I hope this helps.