I assume from the nature of your post, that your A is at stock ridehieght currently. A quick way to get an inch is to install reversed eye main leaves for the front and rear.
The front A spring is also a 7 leaf spring - about 3 too many for a highboy roadster, and 2 too many for a coupe/sedan. You can pull the top two leaves, cut them down to about 10" long, and put them on the bottom of the spring pack. They have to go on the bottom to keep the spring thick enough for the u-bolt retainer to hold the spring properly.
These mods will get you about 3/4" or so by physically raising the spring, and another 1"+ from the softer spring rate. Be sure to get some quality tube shocks for the front; the softer spring rate will need good dampers to keep body roll down. Both mods will make your tudor ride much better.
In the rear, reverse the spring eyes, shuffle two leaves to the bottom of the stack for 2-3"'s....if you want more in the rear, a simple suggestion is to try and find some longer shackles, or possibly fabricate them yourself. It is a pretty simply project, press the pins out of the out ones(or new aftermarket ones) cut some flat stock, drill the proper size holes further apart, press the pins into one side, reassemble.