Slant 6 to survive canadian winter ???

hi guys ! i want to built a slant 6 for my future project car , its a nice dart sport 76 , and it has already a 225 in it with a 904 tranny , i already have a 360 , 400 hp duster and i want to do a daily driver out of this dart .. but is a slant 6 a good engine for winter ? what do i need if i want to make it run propely on winter times ... -20 temperatures .. should i run it in stock form or 2 or 4bbl intake etc etc ...

thx a lot guys !