I took apart a 77 400 engine that I had bought a couple years ago for like $50 and found it had Zollner Z3436 pistons. Does anyone know anything about these pistons? They almost appear to be a flat top style piston. I looked around on the net and cant seem to find much info about them. I would like to try and find more information about them.
Thanks

 

Many different pistons have been produced over the years for the 400. I have a list of 21 different manufacturers but no Zollner.

 

Zollner has been producing pistons mainly for the industrial engine market forever, they are a decent piston if you can find them. My engine builder has been using them for several years and he likes them for a run-of-the-mill engine build.
Check this out: http://www.autofieldguide.com/articles/079801.html

 

From my dealing with them, they are producing OEM only.

Hasting rings bought them out.