The Nueces Canyon teams won 65 in a row from 1956 thru 1961, but at that time District was as far as you could go in 6-man. I believe 1972 was the first year to crown a State Champ.
Actually back then they played 2 playoff games and crowned Regional Champs and that was as far as it went...NC's win streak and how long it was is up for debate...what is your source for it being 65???
In the 1960 season they had it up to 47 in a row and the Texas record was 49 held by Abilene High. They beat Center Point either for the 47th or 48th in a row...then they played Harper and beat them...them went on to win the last 2 games in 1960...however Harper protested their game vs NC claiming they used an ineligible player, the UIL upheld the NC victory but the District Committee did not and awarded Harper the win and Harper was named District Champs and played and lost in Bi-District to D'Hanis....
So like I said the NC win streak is up for debate but it went at least 47 games
SPREAD - Again I stress if that 65 in a row number came from what you saw on Lonestarfootball it may not be correct as that is a work in progress not the end all be all season by season record for schools...