can't add too much to what the guys have already said...but if you want/need original replacement parts, you can check with Tony @
http://4-5-6chevytrucks.com/index.html....so far, the only aftermarket parts place i've had experience with is Classic Parts of America; and they were great
on a side note, good to see another person from familiar territory...i'm originally from Corinth, MS....my dad used to take us to Millington for the Super Chevy Show...i've also been to the Relaxed Atmosphere show there as well....i hope ya'll have fun building the '65, and definitely post pics when you can...it's great to see youngsters who take notice to the classics, and it sounds like you're son is a good kid who'll enjoy and appreciate his truck....should be a great father/son project!