Blower motor vent tube

[1978C10]

1978 c10 replacement blower motor has smaller vent tube hole. Should I just plug it. Can't find vent tube anyway.

 

[dd1990]

I would not cover the hole if you use the blower motor alot, may cause the motor to overheat.

 

[Ricko1966]

Pressurized air is supposed to be forced through that tube to cool the motor I'd improvise ,maybe some plastic tubing and 90 degree spark plug boot.