Do they make 8 bolt crank flex plates for 727 big block torque converters with the 11 inch 11 1/8 size hole diameters?

[luis9995]

Do they make 8 bolt crank flex plates for 727 big block torque converters with the 11 inch 11 1/8 size hole diameters? Has to be for internally balanced engine.

I have an internally balanced 440 with a 8 bolt Hemi crank. The 727 big block I have has a torque converter that is about 11 inches but I heard it’s actually 11 1/8 inches for the hole diameter. I can’t find a flexplate for that online anywhere. Do they make them? If so which one? Need one ASAP. Thanks

 

[Photon440]

There were also some 413 truck blocks with 8 bolt cranks, but I don't know what converter they used.

 

[pnora]

PRW PQ Xtreme Duty Flexplate, SFI

 

[luis9995]

PRW PQ Xtreme Duty Flexplate, SFI

This would be perfect but they say it’s a few weeks to receive and I need it a lot sooner than that. Any others ? I can’t find it no matter how much I try they’re all external balancedwhen I search

 

[oldkimmer]

440 Source had them. I’m not sure if they still do. Kim

 

[luis9995]

440 Source had them. I’m not sure if they still do. Kim

We got one overnight shipped. Not an expert on these things and I’m helping my dad out. So turns out now the crankshaft was the 8 bolt but doesn’t fit the 727 looks like it was made for a 4speed. Is there a way to make the 727 fit? Removing something? Or is changing the crankshaft the only way?

 

[pnora]

We got one overnight shipped. Not an expert on these things and I’m helping my dad out. So turns out now the crankshaft was the 8 bolt but doesn’t fit the 727 looks like it was made for a 4speed. Is there a way to make the 727 fit? Removing something? Or is changing the crankshaft the only way?

View attachment 1808724

Just take the pilot bearing out of the crank. What is all the gray stuff smeared around the bolt heads? I hope thats not ARP thread lube. If it is take it apart and clean it all off. I use Loctite.

 

[1STMP]

This would be perfect but they say it’s a few weeks to receive and I need it a lot sooner than that. Any others ? I can’t find it no matter how much I try they’re all external balancedwhen I search

If you're anywhere near a machine
shop, they can machine an existing
flex plate. Had this done on a Jeep.
Turbo 400 trans w/a B&M torque
converter using a stock Jeep flex
plate. Been on there for 30 years.
Cheap, too....