Nailhead?

block casting number is 343388-1 is this a nailhead and what year and size?

 

I don't know what you've got but here is a great site that can help you identify nailheads. Good luck with your search.

 

DOH! Forgot to put the link in.

www.buicks.net/shop/reference/nailhead_casting_numbers.html

 

Are parts from a 322 interchangable with othger sizes. Intakes, valve covers, etc.

 

Valve covers, yes. Distributors, yes. Intakes, no.