I am looking for a very good overflow tank for the '72 Centurion. Might be the same for all '71-72 B body Buicks.
Mark - is it the one you showed me in Salem? If it is, then it is a 70 big car tank. I have another one just like it in the basement - same orientation in the engine compartment, but different mounting points than the 71-72 tanks.
I think I have an NOS reservoir/lid laying around here. If interested shoot me an e-mail. Tim tcarson@vcn.com