Now in its 68th year, the three-day event brings cars and enthusiasts from across the globe to the Pomona Fairplex.

The America's Most Beautiful Roadster Award is one of the most coveted titles in hot rodding, and this year's champion will be crowned this Sunday in Pomona. Here's Don Lindfors' 351 Cleveland-powered "Boss '32" on setup day. (Photos by Terri Brizio-Hollenbeck)

The America’s Most Beautiful Roadster Award is one of the most coveted titles in hot rodding, and this year’s champion will be crowned this Sunday in Pomona. Here’s Don Lindfors’ 351 Cleveland-powered “Boss ’32” on setup day. (Photos by Terri Brizio-Hollenbeck)

Bill Grant's 1928 Ford Roadster at the 2017 GNRS (Grand National Roadster Show)

1928 Ford Roadster, Bill Grant

2017 GNRS, 1932 Ford Roadster Pickup, Matthew Gordon

1932 Ford Roadster Pickup, Matthew Gordon

Dan Peterson's 1932 Ford roadster at the 2017 GNRS (Grand National Roadster Show)

1932 Ford Roadster, Dan Peterson

1934 Ford Phaeton, Jim McPherson at 2017 GNRS

1934 Ford Phaeton, Jim McPherson

Shawn Killion's 1928 roadster at the 2017 GNRS (Grand National Roadster Show)

1928 Ford Roadster, Shawn Killion

Jame's Hetfield's 1932 roadster ant the 2017 GNRS (Grand National Roadster Show)

1932 Ford Roadster, James Hetfield

Coachbuilt 1936 Packard Roadster, Hollywood Hot Rods – 2017 GNRS

Coachbuilt 1936 Packard Roadster, Hollywood Hot Rods

Scott Hawley's 1932 Ford Roadster at the 2017 GNRS (Grand National Roadster Show)

1932 Ford Roadster, Scott Hawley