Thanks for your comments on my cub...it was quite a job restoring it,but I like repairing older quality products...as far as the grille,I did fabricate it up from a metal mesh grille I had and it's better than plastic ...as far as heating the cab,air is drawn out of it through the side panel vents..the m18 does not put out enough amperage to run an electric heater...so I just wear a jacket...it's way better than being covered in snow anyway..the 450 snowblower is the correct one for my 1862 also..