340 factory tri power air cleaner base

That is a Segal air cleaner base, yes the same one Mr. Norm used for the 71 six pack GSS Demons only. I sold one just like it with the factory drain parts bolted on for $200 this year. There is NO air cleaner element currently made that will fit it, you have to take a six pack or K&N element and cut it to make it shorter. Also the factory elements were only 1-1/2" tall, so the normal six pack elements are too tall for the hood to close with a factory manifold...