If the action continues "as if unblocked", all action modifiers and reaction cards are still in effect, even those pertaining to a successful block.
100045
Ambulance
Vehicle.
After a combat between this acting minion and a blocking minion, you may lock the Ambulance to continue the action as if unblocked. If the action is blocked again, burn this card. This minion may lock the Ambulance to attempt to burn an incapacitated imbued as a +1 stealth Ⓓ action. A minion may have only one vehicle.
Rulings
If the action continues "as if unblocked", any Methuselahs that have declined to block before do not get another opportunity to block.
For actions resulting from an action card, "continue as if unblocked" moves the action card from the ash heap (where it went when the action was blocked) to limbo (where it should be if the action is not blocked). If the action card is not in the ash heap, then the action cannot be continued.
When blocked after continuing, the burn effect must be applied, ordered by the acting Methuselah, before any other card or effect can be used (eg. Crypt's Sons, Change of Target).
The action provided by the equipment to the attached minion fizzles (resolves successfully for no effect) if the equipment is not attached to the acting minion when the action resolves unblocked.