1968-1972 Chevelle Firewall Block Off Plug
When 1968-1972 Chevelle Firewall Block Off Plug ,working on a 1968–1972 Chevrolet Chevelle firewall, there are a few entirely different types of “block-off plugs” or “delete plates” depending on which specific hole you are trying to seal.
Depending on your restoration or restomod goals, you are likely looking for one of these distinct solutions:
1. The Kickdown / Throttle Cable Hole Fill Plug
If you are referring to the small plastic/rubber hole plug that sits on the driver’s side firewall directly below the throttle cable entry point, this is a highly specific, frequently missing factory part.
- Purpose: GM stamped this round hole into every 1968–1972 A-body firewall. It was only utilized on cars optioned with a Turbo-Hydramatic 400 (TH400) automatic transmission to route the electronic kickdown wire. If your car came from the factory with a manual transmission or a TH350, GM inserted a specialized plug here to keep engine heat and fumes out of the cabin.
Large Heater / AC Core Delete Plates
If you are performing an LS-swap or modern restomod and removing the massive bulky heater box or factory air conditioning unit, you need a heavy-duty metal block-off cover rather than a small plug
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