Welcome. I have '67 400 coupe so I am pretty familiar with the 1st year. I would start off by getting the original factory documents for your car so you know what you really have:
I would also put together my own reference library. I am probably old school, but I like books and manuals at my fingertips. I would suggest having on hand:
1) Factory 1967 Fisher Body Manual 2) Factory 1967 Pontiac Service Manual 3) Factory 1967 Supplemental Firebird Service Manual 4) Camaro Restoration Handbook by Ron Sessions (shows you how to disassemble the car) 5) 1967 Camaro Factory Assembly Manual (Shows you how to put it back together/no Firebird manual available) 6) Chilton's 1967 - 81 Firebird Manual for basic info (like tuneup specs)
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI