i woudl jsut stick to bolt ons for now. this is the car that you wanted to have as an easy driver to enjoy, heads/cam/blower will be better once you make it into a race car.
cold garage? mr. heater can help. deep dark winter can be turned into t-shirt weather in under an hour
and 1 propane tank will get you most of the way through the winter. available at lowes of course