1964 Barracuda Restomod

Welcome from a fellow engineer and Barracuda owner. I think you will be happy with the 3.55. I ran a 4.30 behind my 340 for 40 years, and it was great fun around town--but it was definitely not a highway cruiser! However, had a 6-speed tranny been available way back then, that 4.30 would have been much more practical. Unless you just want the carb for visual appeal, I would think about an aftermarket injection system--easily tunable, and much more livable in your cold climate! I would have replaced my 40-year old 700 double pumper with injection on the 340 had I not decided to upgrade to a 3rd gen hemi with Hilborn injection. Good luck with that garage insulation project; I guess I am spoiled since my garage only ranges between about 65 and 78.