Flex plates - all the same or is there a benefit?

[davepl]

My existing '70 402 flexplate has a couple of chipped teeth and a note from the machine shop that did the engine machining and balancing that says "Bad - Do Not Use", with no other explanation.

So, I figured I'd just order a new one, but I see they range from $35.99 to over $200, even within the same brand (Pioneer, in this case).

Granted the really expensive ones are SFI certified which I don't need, but beyond that is there really any difference amongst them? On O'Reily's alone I have six to choose from, not sure what to look for.

Thanks!
Dave

PS: If if matters, I'll be running a TH200-4R behind it with a smaller than stock converter, but I don't think it should matter. The original is your standard neutral-balanced, 14 inch, 168 toother.