AFAIK - there are 2 manufaturers of seat backs & there are 2 different backs. What is Year-One selling? & What's the price?

Palco - cheap, maybe driver quality VS. BE&A - high quality (other manufaturers??)

A,B, E-body 1970 to mid-1971 VS. B-body mid-1971 to 1974 (same as A&B just different usage years)