For comparison purposes, here are the measurables of some of Florida's key contributors. All of these measurements were taken after their Senior year of high school, remember, so they were undoubtedly bigger and stronger by the time the Championship game rolled around.
OL Carlton Medder, Clermont (Florida) South Lake) (6' 4", 327 lbs)
OL Steve Rissler, Sarasota Riverview (6' 3", 315 lbs)
OL Drew Miller, Sarasota Riverview (6' 6", 305 lbs)
OL Jim Tartt, Crawfordville (Florida) Wakulla (6' 4", 310 lbs)
OL Phil Trautwein, Voorhees (New Jersey) Eastern (6' 7", 310 lbs)
DL Joe Cohen, Palm Bay, Florida (6' 2", 240, 4.47 forty)
DL Jarvis Moss, Denton (Texas) Ryan (6' 7", 220 lbs, 4.48 forty)
DL Marcus Thomas, Jacksonville Mandarin (6' 4", 285 lbs)
DE Derrick Harvey, Greenbelt (Maryland) Eleanor Roosevelt (6' 5", 235 lbs, 4.7 forty)
LB Brandon Siler, Orlando Evans (6' 3", 220 lbs, 4.52 forty)
LB Brandon Spikes, Shelby (North Carolina) Crest (6' 4", 235 lbs, 4.76 forty)
WR Andre Caldwell, Tampa Jefferson (6' 2", 180 lbs, 4.39 forty)
DB Reggie Nelson, Palm Bay, Florida (6' 0", 175 lbs, 4.37 forty)
QB Tim Tebow, St. Augustine Nease (6' 3", 217 lbs, 4.69 forty)
The lightest offensive lineman was 305 pounds. The shortest was 6'3". Everyone else was comparable in size to the guys in the '60s, but most likely much faster. Yes, craftiness and experience count for something, but speed counts for more. Jerry Rice was plenty crafty as a 43-year old trying to make the Denver Broncos, but he got cut from the squad because the younger players were simply so much faster that they could close and make the play after Jerry Rice beat them with his craftiness. Florida had two D-linemen running sub-4.5 forties. They had a free safety and a WR running a sub-4.4. Their freshman backup QB wouldn't have looked out of place lining up at LB for the 1976 Pittsburgh Steelers.