HELP. Mounting 454 to A 700r4

[ryanstrucking]

Ok.
Heres my problem. I have my injected 454 mounted wired and ready to go, I installed the tranny and t-cases tonight but I ran across a big problem when I went to bolt my torque converter up to the fle plate of the 454. THE HOLES DIDN'T LINE UP. The holes on the flex plate are 1/2 a hole to large....
What I mean is: The bolt patterns are half a hole out........
What has to be done here, is there a different flex plate I can buy or what?
Any help would be greatly apreciated.
Ryan

 

[Zeus33rd]

Did you get the correct flexplate for 454?

 

[4X4HIGH]

GM has a flexplate for the 454 that has both bolt patterns. You must make sure it is for a 454 though as they are externally balanced unlike other GM engines that are internally balanced.

 

[ryanstrucking]

the flex plate that i have came with the motor. I know like the 400 the bbc are externally balanced and have a different flex plate than a 350. I guess its of to the motor shop todayto see what i can find.
Regards'
Ryan

 

[hero]

Use a different torque converter. That's what I had to do.

 

[4X4HIGH]

The torque convertor cost about twice as much as a new flexplate.

 

[Thunder]

This is what you need:http://www.cnc-motorsports.com/product.asp?ProdID=8761&CtgID=1092
OR if you have the 1 piece rear seal BBC:http://www.cnc-motorsports.com/product.asp?ProdID=8762&CtgID=1092
I think you can also get these from Summit.
Just make sure you get a heavy duty SFI approved flex plate if you are putting it behind a 454.

 

[ryanstrucking]

This is what you need:http://www.cnc-motorsports.com/product.asp?ProdID=8761&CtgID=1092
OR if you have the 1 piece rear seal BBC:http://www.cnc-motorsports.com/product.asp?ProdID=8762&CtgID=1092
I think you can also get these from Summit.
Just make sure you get a heavy duty SFI approved flex plate if you are putting it behind a 454.

Thanks thunder.
The second link is the flex plate I just picked up today. $50 cdn.
Off to the garage to r&r the tranny again.
Later