Hello! 49 Frazers are nice road cars and properly tuned, the Continental 6 should give you plenty of power. Everything you need for a tuneup is available at your local NAPA store. The part numbers for the tuneup items are:
AL62 - Ignition Rotor
AL63 - Distributor Cap
AL 869 - Condensor
CS 719A - Ignition Points
J8C - Spark Plugs (Champion)
If you need new ignition wires, you can use a set from a 1968-1972 Chevrolet 6 cylinder (250 cubic inch engine). They will fit, although the longest wire is a bit longer than the original.
About the interior parts, post a list of wants, maybe someone out there will have what you need!