Chris,
Bottom navigation support link goes to
https://alconkits.com/#
I'm not much of a car guy or good at UI so no comment there.
The one thing that may be nice is some reference on the contact page as to where you're located? I realize this may be a nebulous subject given the nature of your business, but I'm often a little suspect of online sites with absolutely no reference (that I could find) as to where the folks are that I'm dealing with. Even just a vague reference to 'Chicago Suburbs" or 'Illinois Corp' etc. would add a little weight? Also understandable if you don't want that at all.
Cool to see what you've put together over the years with regards to that business and good reputation in general.
-Bernie