what makes it run differnet when cold?

[66StangGuy]

ok ill check to when its cold and warm and see its posistions.
as far as power goes though i know whats you mean about colder days making it run better but usually after work its about 60 F outside and it just runs like a beast. i pickup more power then you would expect from just being cold outside. i think i may just need to get a jet kit. i have the holley 4160 4bbl vac sec. what do you think i should get for jets? also should i get the adjust a jet kit because i plan on doing heads and cam in about 2 months or less.

anyone made a good intake system with stock hood and not cutting the car up? cold air is a plus.