Let the Fun Begin - 1965 Barracuda Project

Can I use the manifolds from the 273 because I think I have some extras of those in my parts or are the holes on the 318 slightly larger?

Also, I put some valve covers that look like they came off the 273, that I think would work/look better on the 318. Any issues with using the older valve covers on a new 318?

Lastly, is it not recommended to sand blast valve covers due to how hard it might be to get the sand out from the inside? Or should I just wire wheel them if I want to put a fresh coat of paint on them?

Have a great weekend everyone!