WINNINGTON were nudged off the top of North Two West on Saturday when they were beaten at Burrows Hill for the first time this season.
Penrith join Winnington on 16 points but have a better points difference having beaten Aspull by 70 points.
Stockport deserved their victory even though it was Winnington, bolstered by the return of Mark Warr, Carl Patterson and Jonny Evans, who started the brighter.
The home pack knew that they were in for a challenging afternoon because their opposite numbers were rated among the best in the league.
Warr opted to kick for touch from a series of Stock-port infringements near to their own line. Just as the home crowd were calling for West of Scotland referee Gus Tweedale to award a penalty try, Park moved the ball right for centre Sam Barton to dance his way over the line.
From the restart fourth-placed Stockport showed they were relishing the challenge and for the next 20 minutes they dominated play, keeping Winnington under pressure deep in their own half.
But Stockport's first score came as Park seemed to have ridden the storm. Prop forward Anthony Sullivan was caught in possession with little support and Stock-port countered briskly, their five against three advantage resulting in a try for scrum-half Chadwick, who also converted.
Winnington responded through Ben Richardson who made a fantastic break from halfway and after a powerful run he was stopped inches short of the line.
The second-half saw Stockport retain the upper hand. Their pack smashed into rucks and mauls and, without the quality of ball they had been used to, Park's backs could not find their rhythm.
Stockport scored another try on the hour as they turned defence into attack. Sale Jets winger Healey was instrumental, skipper Wrat-hall was the scorer and Chadwick converted.
Park were then denied a try-scoring opportunity as the Stockport touch-judge momentarily flagged for Carl Patterson stepping into touch, only to realise that he hadn't and bring his flag back down, but referee Tweedale blew his whistle and Park's chance had gone.
Winnington began to lose their shape and they were not helped by Andy Barnes's 10-minute visit to the sinbin for a petulant trip.
Chadwick added three penalties to take his personal tally to 18 points, but Winnington scored a consolation try from the rampaging Mark Taylor.
Captain Matt Dodd said: 'We struggled to get going. There wasn't a lack of individual effort more that we didn't really play well as a team. We will have to do a lot of work in training this week to put a few things right.' Winnington are at Aspatria on Saturday.
Richard Armstrong, selected for the North development squad, broke an ankle as Winnington U16s beat West Park 22-0 (Andrew Heptin-stall, Matthew Sant, Stefan Downey, Leon Driscoll tries; Heptinstall con); U14s beat Altrincham Kersal 24-5; U13s beat Altrincham 38-5 (Bud Skinkis 2, Chris Yearsley, Dyfed Thomas, Joe Ralph, Will Levy tries; Alec Butcher 4 cons); U10s beat Caldy twice, 20-5 (Sam Mowbray, Elliot Reeks, Alex Moreton, Oliver Mills) and 10-5 (Moreton, Mark Toleman).