408 Question

321Scamp said

just got done talking to summit. the picture matches the part i have. It has three small holes in the motor side of the damper. that matches there picture and it is for a internally balance motor. However, the pulley side of the damper has a machined groove about 2/3 around it that is machined out to about 1/4" deep. that tells me it is for external... am i wrong? the only problem is that my part was shipped straight from the manufacturer, so they could have sent me the wrong one.

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1. All 360's from the factory were externally balanced
2. The OEM damper you have needs returned, the listing is simply incorrect. it's for an OEM 360 yes. but not one that has been set up as internal balance. i'm assuming it's this one being it's the cheapest dorman damper that comes up on their site. Dorman is probably 99% OEM replacement parts. not aftermarket. Again the web listing on this damper calling it internal...is WRONG.
3. they also sell neutral balance flexplates. I would not use an OEM flexplate with an aftermarket internal balanced engine. if yours was from a 318, then yes thats an internal balance engine..but i still wouldn't use it.