Re: OT. Externally balanced 350 question

Posted by hogman_2002 on March 31, 2007 at 06:54:57 from (66.196.4.221):

In Reply to: Re: OT. Externally balanced 350 question posted by Bob on March 30, 2007 at 21:35:29:

The engine he took out of the suburban is the original 350 engine that is internally balanced.
The engine he bought is a GM Performance Parts 350 HO Deluxe engine(12496968). It is the 86 and later block with the one piece rear main seal and the engine is externally balanced.
The spec. book he got says to use either flexplate 12554824 or 14088761 if the flexplate sent with the engine isn't the right one. Either one will work because the both have the right bolt hole pattern for the torque converter. One is a heavy duty flexplate and one is a regular flexplate.
So now he needs to know if the rotating assemble needs to be balanced or can you put the new flexplate on and not have any issues.

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