So...to clear this up.
The first F-16 that was theoretically capable of supporting an Aim-7 was the Block 25. Prior to that the radar was not able to support the Aim-7 from launch, guidance and terminal impact.
In response to the retirement of the F-4's in the late 80's and the lack of availability of the F-15A's for transfer to the Air National Guard's Air Defense Forces..the USAF elected to take the newest F-16A, the Block 15, and create a limited run of F-16's that were capable of supporting the Aim-7 as the Aim-120 was still in development and testing at that time (1987-1988, etc).
The F-16 Air Defense Fighter (ADF) could haul two Sparrows and was used by a few different ANG units...North Dakota, Florida, California, New York, and possibly a few others that I'm forgetting.
A few export only Block 30 F-16's were equipped to support the Aim-7, but otherwise no USAF F-16C's (Block 25+) officially were equipped to use the Sparrow. By 1991/1992 this point was moot anyway due to the Aim-120A being introduced into service and the F-16 was rapidly refit to support it almost as soon as it hit formal introduction.
So while the F-16 did carry the sparrow, no USAF/ANG F-16's ever did, and the Block 50 certainly never did.