I grew up on a farm in Northern Illinois in the 60's & 70's and do to the fact that there were so many family farms back then I remember each and everyone of these tractors in that era. And back then those farmers were extremely loyal to their brand of equipment.
Honestly, the tractors re-powered with 2-stroke Detroit diesels are my favorites purely because of how awesome they sound! I think someone even pointed out a few videos ago that they're literally the most efficient way of converting diesel fuel into noise. Are those particular tractors straight-piped?
The MF 1100 and IH 1066, I've plowed with both of those. I was a little surprised to see so many tractors from the late 60's and newer without cabs, 80 miles north of Belleville all of the larger tractors had cabs after about 1970. Our '68 1100 had an aftermarket cab and the '76 1066 had a factory cab.
The kid on the 4620 with the White 588 plow deserves special mention. I watched him several times and he did a great job (better than some of the ol’ boys who have probably plowed most of their lives in fact.) He made a lasting impression on me.
Great video, big tyres, big exhaust's and big on the throttle for some, seems some drivers thought the speed limit is 40mph, way too quick for my liking, excellent display though. cheers from Adelaide, South Australia.