b body floor pans

who makes the most exact replicas for a 69 b body?

I replaced the floors in my 68 and 69 with AMD. Pretty good fit. But after 40+ years of hard knocks nothing will line up perfect.
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After 50 years a lot of these cars are bent. You need to check the frame and fix it if needed before you replace any panels

Which frame are we talking about? These cars are unitized.

The AMD floor pan fits well,and since the cars are indeed unitized construction,you want to get the sturdiest part possible. The AMD floor pan is made of heavier guage metal than the others on the market,for the difference in price,it is worth it to have a stronger piece.