Well i think daniels is a perfect 3-4 de. I call them the bowling ball types. Shorter and over 300 pounds. The ones with burst are very destructive. They get push. They are burners who get a decent rush from the position... Solid against the run. Just like a 4-3 dt??? Yep.
Clark is a slightly bigger daniels who has great leverage... Boom. Done deal.
The wrestling thing. I see the leverage comparison thing. Its good technical stuff... But i see a guy who beat every other guys his size in his state. 1 on 1.... That means lts wont be able to handle him 1 on 1. He will make plays until they give the tackle help. And thats huge!!## opens up everyone else...big time...
Add that to daniels and our hall of fame olbs... Its going to be dominating.
*Sigh*
You're getting your linemen confused again.
3-tech DTs from a 4-3 are not necessarily good run defenders. They are more pass rushers, though it's pretty close to an even split, maybe 60/40. The setup in most modern 4-3s is to have the 1-tech NT hold the center and one guard. This is done more by positioning, though he has to be strong enough so that the play-side offensive lineman cannot handle him too easily. The basic premise is that you need two guys for the one defensive lineman because if you don't, he has
positional leverage to make the tackle.
This in turn sets up the 3-technique to have a 1-on-1 with the other guard's outside shoulder. In pass sets, he's slightly more outside and can use quickness and speed. In the run game, the same basic ideal applies as the one technique. He's positioned such that we dictate who has to block him, because if you don't, he's in fine position to make the tackle.
0-tech NTs work a little bit by position (completely occupying the center) but more by being good. It's not enough to just occupy the center--if this is the case, the offense is happy, because now the guards can pick off the ILBs easily. You want the NT to be strong and laterally quick enough to again force both the center and playside guard to account for him, else have him in perfect position to make the tackle.
Which is the setup of the lineman's example of "they pay the other guys too." The biggest thing offensive linemen are taught in the run game is "your man does not cross your face." Defensive linemen are taught to "cross you man's face." And the collisions happen.
Now regarding length/height.
The reason you want to longer and taller as an edge defender is because tackle are long and tall. Yes, players can succeed without length (Daniels as a 5-tech end in base, James Harrison as OLB) but these guys are more exception than rule.
If you are short, those long arms that are coveted in OTs get to you first. You are now at a disadvantage. Now comes the swim/rip/other counter-move. Again, if you are short, you're at a disadvantage, because you have to counter sooner and it gives the OT more time to recover and counter your counter.
At the inside, it's less about speed and more about quick. DTs/NTs are close to the centers and guards. The pass protection sets are close to the line of scrimmage. It's more of a wrestling match and less of a boxing match like it is on the edge. This is why bowling-ball guys (typically) thrive inside and struggle on the outside.
Also, if you're short, it's harder to bat balls at the line of scrimmage ala JJ Watt. This is actually an important, if underrated job of ends in the 3-4. That height is was is suppose to help take away short-middle passing. If there is a giant man in the way, quarterbacks will either not throw it or have to lob it up and over them. This gives your linebackers and safeties more time to come up and make a play on the ball/man.