Thing is about the Habs record it was tilted to them by a few advantages not seen today. They were playing in a post expansion era, most bottom teams were brutal, no salary cap. No way the Cleveland Barons which just moved there from California (Golden Seals) or any of those struggling non established teams could afford to compete with no TV deals or media. They could not field a good team or attract good players. The Kansas City scouts moved to become the Colorado Rockies the same year. Montreal was still enjoying the fruits in the past of protected territory of players they could chose from. They held rights to all players from Quebec and parts of western Canada, they had players from that period on the team. No way they build that team nowadays, it was unusual. Still they were a great team but a different time. They did feed on those bottom dwellers like Washington, these teams were so badly run that the league shelved ideas of further expansion to of all places Seattle the next year, the 1977/78 season.
Up until the institution of the draft (1963) the same rules applied to all. Montreal took advantage by sponsoring a lot of amateur and Junior teams in their backyard that gave them access to a lot of Quebec born players. The institution of the draft in 63 changed that. However the first few years of the draft there was not much available as most good players were already property of NHL clubs.
Using Bobby Orr has an example the Bruins had long ago sponsored his Jr team and got his signature on C form committing him to the bruins. otherwise he would have been eligible for the draft in 1965.
As compensation for giving up their massive sponsorship base Habs got the option to choose 2 playes from Quebec 1st in early years of draft. up to 1969. The only players of any significance acquired this way were Marc Tardif and Rejean Houle.
The habs built the great teams of the 70s (including 76-77) through the draft. They quickly realized the power of the draft after getting past the 1st few years and took advantage of expansion teams by trading current year picks for picks a few years in future. How was that 76-77 team built
Guy Lafleur - drafted no1 overall with Pick from Golden Seals (habs traded seals a 1970 1st rounder to get seals 71 1st rounder)
Shutt drafted no 4 overall in 72 with a Kings pick that they acquired 4 yrs earlier in 68.
Robinson drafted no 20 overall in 71 with another Kings pick
Lapointe, lemaire, cournyour & Savard- left over from old sponsorship days acquired same method bruins got Orr
Mahovolich - acquired by trade
Risebrough picked 7 overall in 74 with a pick acquired from St louis
Lambert claimed off waivers from Red wings
Rejean Houle- The quebec advantage - only guy on the roster - wasn't worth it considering the damage he would later do as GM
Tremblay 12th overall 74 draft with a pick acquired from the Kings
Gainey 8th overall in 73 a st louis pick that habs acquired by flipping the 5th pick previously acquired from atlanta in a series of trades (11 picks with 6 of them 1st rounders changed hands in those 2 trades)
Jarvis -acquired by trade from Toronto
wilson drafted 11 overall in 1971 with Habs on pick (one of the few they had not traded away to an expansion team for a future hopefully better pick)
Dryden - via trade from Boston.
so top 16 guys on that team
4 left over from old system c- form sponsorship etc (Lapointe, lemaire, cournyour & Savard)
6 Drafted with picks acquired from other teams (Lafleur, shutt,Robinson.risebrough,tremblay, Gainey)
1 drafted with their own pick - Wilson
3 via trade Dryden, Mahvolich, Jarvis
1 waivers- lambert
1 from the Qc advantage - Houle
The habs of the 70's were built by taking advantage of expansion teams willingness to trade future draft picks.