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Universal Aftermarket cheap solid Plastic Flywheel cover for LH or RH side mounted Starter motors.
GM Universal T350/ T400/ T700R / 4L6 /4L8
OLDS 403 USE THIS.... cut out the hole.. not rocket science.. not exactly per factory but close enough, cheap enough.. and does the job it meant to
Fits 90% of GM Auto Transmissions as shown.
If you don't have an old one as a guide.. cut out holes for LH or RH Starter motors from the guidelines.