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Username Post: What Flex Plate matches 4L60E to a Mark IV BBC?        (Topic#375305)
68Cam 
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Posts: 80
68Cam
Loc: Des Moines, IA
Reg: 05-29-04
07-07-24 07:13 PM - Post#2871574    

I have a 502 that's built like a Mark IV (396, 427 - not like a crate engine). It's internally balanced & has a 2 piece rear main seal. Flex plate needs to be 14" wide with 168 teeth. I have a new TCI 4L60E Trans package that's supposed to handle about 725 hp/800 lbs of torque. TCI says that GM Perf Parts makes the Flex Plate that I need, but I've just found out that they don't make it anymore. Also, I have not been able to find out what the old part # for that Flex Plate was. Therefore, I can't connect my Trans to my engine. The Flex Plate needs a 11.063" diameter bolt circle. The common Dual pattern Flex Plate like TCI 399273 has a 10 3/4" bolt circle & also an 11 1/2". Does anybody know where I can find the Flex Plate that bolts to the Mark IV which also has the 11.063 bolt circle? Thanks



 


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