Yeah, it would be Varsity Scouts. Venturing - the program today - didn't start unti 1998.
There are very few Varsity Scouting Teams in non-LDS Scouting units.
In our troop, we have a relatively high percentage of older boys. We had our own program we call Senior Scouts. They or at least some wore the dark green explorer shirts.It was informal and we did what the boys liked.
Under my tenure, in addition to an expanded backpacking program, we went caving and rappelling. At other times, there was canoeing and hiking emphasis. There is also a very strong Order Of the Arrow component that involves a lot of special and leadership activities.
This is seamless within the troop. Today they have a venture group, orange epaulets, but it functons in a similat manner as it always has. Like me, there are one or two assistant scoutmasters with the responsibility for the older boys program