[Ross F-1]

Lots of debate on this, but I've seen lots of F-1's and F-2's with 8BA's, and credible evidence they are original. I've not seen an 8BA in a larger truck as original tho. When you get to late 50s and on, when they started dropping the hardened seats (first just on intakes, then altogether), I think they were more strict about putting the RT's in trucks.