Flexplate spacer.
Are you putting the 6.0 in the C5, if so, just use the ls1 flexplate.
This is my trans.
If it's all (intake, throttle body and trans) from a 1999 F-Body, no spacer required. Just use the F-Body flexplate and converter.
If it's all (intake, throttle body and trans) from a 1999 F-Body, no spacer required. Just use the F-Body flexplate and converter.
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