Good info Mike, thanks for sharing. You might consider the Hooker headers that are are on super sale right now. As far as I know, they “should” fit a ‘62 full size as well as 1st generation Firebirds. At the price, it’s worth a shot. I have a nice set of original IA headers for my ‘63 that fit great.
Looking forward to hearing how it drives in the real world.
https://www.holley.com/products/exha...arts/4107-1HKR