Jim Ahern finished alone in second place at 13-under-par 200 after a round of 65. Craig Stadler was one shot further back along with Dan Pohl at 12-under-par 201.
The 50-year-old kept on cruising at the par-4 14th and landed his second shot inside 20 feet. Streck drained the birdie putt to reach 15 under. He capped off his bogey-free round with a birdie at the par-5 17th.
'For three days I played pretty solid,' said Streck, who won twice on the PGA Tour. 'This win was a lot easier than the others. I'm more excited since my family is here. That's never happened with my other wins.'
Ahern rolled in a 20-footer for a birdie at the par-3 second and chipped his third shot within tap-in range for a birdie at the par-5 third. He then hit his tee shot to 3 feet for a birdie at the par-3 fifth.
He ran home a long birdie putt at the par-4 10th and played his approach to 3 feet for another birdie at the par-4 11th. The 56-year-old converted a 15-foot putt for a birdie at the 14th and hit his second shot to 6 feet for a birdie at the par-4 15th to move to minus-14.
Ahern found trouble at the last, however, and left with a closing bogey after an errant drive.
'I wish I could have had that one back,' Ahern said of his tee shot on the 18th. 'I hung in there and I'm proud of myself for that. I've worked hard on my game the last three months and it's getting better.'
Tom Jenkins posted a 70 in the final round on the Red Course at Eisenhower Park to finish fifth at 11-under-par 202. Gary McCord, Dave Eichelberger, D.A. Weibring, R.W. Eaks and Darrell Kestner tied for sixth place at 10-under-par 203.
Mark James, who will defend his title next week at the Ford Senior Players Championship, shot a 68 to join Morris Hatalsky, Wayne Levi, Bobby Wadkins and Tom McKnight at 9-under-par 204.