I usually use napa, but i have some junk parts from napa also. Right now i have a wheel bearing going that just was replaced 3 months ago that from napa. I guess you just never know.
I was thinking about this for a few days now since your putting in a big block in your car which had a 302 in it. I was thinking you may have to do some mods to make the motor fit, I could be wrong. I would throw this out to classic guys for more information, just a thought.