Unlike Purdue, Most quality teams like Michigan OSU and other top 10 teams have very quick 300 pound defensive ends as well as 300 pound DTs. hazell thought having quicker, smaller 240 DEs was a great idea, and that the y could run around the o-line. in doing so, they ran so much, they tired out by the 4th quarter, and were run over.
back to the o-line. If you face a decent team where their front 4 or 5 are all 300 pounds, you want somebody bigger. And when pass blocking, both a tackle and guard may zone block and have to block against both a d lineman and linebacker or safety. So you want your tackles to be huge.
and if you're run blocking, you want to be able to plow through the opposition.
in reading your comment, I guess you are asking, which is better, big slow guys, or smaller quick guy. My thoughts are that the smaller, quicker guys will tire out faster from the beating, and when you need them most in the 4th quarter, they will have nothing left. but the big , slow guys don't really need to run, they jus t need to open holes for RBs to run through, and create a wall for a QB to hide behind.
I believe the concept of having smaller , quicker linemen is flawed on both sides of the line. Do you want Purdue to be a top 20 team? if so you need to have both lines filled with 300 lb linemen who are quick. 250 pound linemen are for MAC teams.