I just put a set of tin man connectors on my 71. Found the curve on the left connector was a little too aggressive, spent two hours with a torch and 6 ft bars correcting the bend for a snug fit...
When I had my engine dyno'd they recommended to use Mystic 15W 40 after the break in oil. Apparently he runs this in both of his 1000+ HP BBF engines due to higher levels of Zinc. Best part is fleet farm sells this oil for 58$ for 5 gallons with a 20 rebate
In Minnesota I have seen plenty of vehicles with original plates for the year of the vehicle on them and I know this is legal, at least in MN.
Subd. 1g.Original plates. A vehicle registered pursuant to subdivision 1a, 1b, 1c or 1d may in lieu of being issued number plates by the commissioner...