I’m a newb, hence this section. I’m wanting to know if I can use my stock Flexplate with my powerglide. Original combo was a 2009 LY6/4l80 from a GMC 3500. It’s going into a 1985 Buick T-Type. Street legal but 90% drag car.

 

I would suggest purchasing a SFI approved flexplate if you are building a high-performance vehicle.

 

Thanks! Do you know if the stock Flexplate will work?

 

Did you read the stickies?

The answer to your question is...sortof

You can make any stock flexplate work if you order the converter properly to match

With a stock 4l80e flexplate you'll need a standard "th400" converter
meaning standard short pilot
and standard 11.5" bolt circle