Stock height valve covers were used in that old Hot Rod article. If I remember right those angled ones are F-body A/C & power brake covers.No problem. Also I used the valve covers that had the angled side and they fit no problem. Others may have fit but I'm not sure
We love N. Tonowana Assembly.That could be. They were also on alot of heavy trucks, crate motors and used alotnin the marine industry. I believe mine were originally from a heavy truck because they had the tonowanda emblem on them
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