well its got some get up and go think its had some work done to it.. the carb isnt stock unless they cam out with holly carbs
Maverick/Comets never came with a 4 barrel carb of any kind - your Holley carb, Edelbrock aluminum intake and aluminum valve covers have been added at one point.
Welcome to the board. I doubt much more than the carb and intake has been done to it, since it still has the stock distributor and coil, and exhaust manifolds.