Perfectly fine carb for your application. Can't be easily converted to mechanical secondarys,... but it doesn't need to be anyway, you can get a vacuum secondary spring assortment from Holley to tune the opening point on the secondarys to what works best for your engine. Holley # 20-13, $10.
You will also want a accelerator pump cam assortment kit Holley #20-12 $20, and possibly a larger front pump nozzle but you won't know what nozzle size until you start on-car testing.
You can also convert it to the high flow HP style main body, this is a nice mod to do but not a necessity, Holley and Proform sell the main body kits. Roughly $100. You can improve the stock main body be milling the choke horn off for a good cheap upgrade, this was a real common performance mod before the HP body became available.
Really good carb for all around stree/strip use, I've done several on different cars that run 10 second 1/4 mile times.