Boy your idea of "not too bad" of a job must be a lot different than mine. lolYeah if you smell antifreeze then your heater core needs replacing. Its not too bad a job, Just search theres a few thread on it.
Just a heads up - the blower motor resistor is by the passenger side footwell and is about a 5 min job. Unless you are referring to the blower motor itself?not a bad job huh? man you must be good. do yourself a favor when you change the core. get yourself a new blower motor resistor its buried under the top of the dash and if it goes bad later you gotta do it all over. a little extra cash but worth it in the end.