In search of a flexplate for my new engine. I have a 1 piece rear main, internally balanced assembly. I need a 153 tooth with a small BC torque convertor (10 3/4"), and it looks like the cranks BC is 3.0"

Summit has a ATI (p/n 915533) that sells for $195. It is going to be on back order for 14 days! Any one use anything else or have another recommendation. I want something that is at least SFI approved.

 

I just bought an SFI flexplate through Jegs for $60. Its a generic Jegs brand, but its at least better than stock.

 

I'm still having some trouble and even my engine builder hasn't found one yet.

What is the deal? Is this why some are using 168 tooth with the mini starters?

Did GM not make an internally balanced, 1pc, motor after 86?

I'm not sure if I can take a externally balanced plate and knock off the weight.

I talked to 3 differnent parts dealers, the $200 ATI, someone that said they don't make one, and I now have to return a TCI that was specked for all chevys 1pc. Apparently 86 and newer doesn't fall under their marketing definition of "all."

The only thing I know is I need the small bolt patterns for the crank and the torque convertor. 3.0" and ~10.5" respectfully.

Just in case this helps anyone I'm using the Eagle 4340 crank with 6.0" rods.

Thanks anyone!