What is field stock?

[Terry]

I was at the Markerville Vintage Machinery Show June 26 and 27.About 70 tractors were on display. The weather was warm, with a shower friday evening. As I looked over the grounds,more and more collectors are dressing up tractors with  twin stacks, chrome gas caps,  clear coated paint jobs, deep lug radial tires, engines that  rev four or five hundred rpm over spec. The list goes on and on.
What is `field stock`? The rules of engagement for tractor pulling in Alberta state the tractor will be field stock for the day it was used for farming. 
Our 1936 W30, 2 Farmall Ms, and our 1950 MD looked decidely plain compared to the 'new look' for 2010.
 

[KenWood]

Terry,
Good question....
I like a good paint job, because i have no plans of ever having to repaint any of my tractors. Clear is a great protector.
Where we pull, radials aren't allowed. Chrome seems to be frowned on, I'd never put a chrome pipe or a straight pipe on any of my tractors. I keep the engines at stock, the rpms at stock etc.
No one seems to be enforcing the rpm rule, but it will come I'm sure.
Best
Ken

[Terry]

Ken, It's a discussion that never ends.  My old friend Sandy Fraser thought only tractors on steel were antiques. Now some shows are pulling 806s and 4010s.  And you see a lot of newer Cockshutts now.  Times change as the collectors and pullers get younger!  Chrome pipes and parts may be what it takes to get the next generation interested.  

[MB. CAT]

Hi Ken And Terry

Just got back from putting on another pull (I have a sled that I take to fairs to put on pulls for them). We had 27 tractors pull at this one, we pull what we call stock antique. thatis; must be 1960 or older it must be original in appearence and power train. we allow factory replacement parts (like super pistons and sleeve if it is factory specs.; RPM's we allow 10% over factory; original tire size, no duals no radial tires, although we may have to change our thinking on this)no turbos.
We pull classes; under 5000lbs, under 6000lbs, under 7000lbs, under 8000lbs, under 10000lbs.
We usually pull on a 400 ft track; score is actual distance pulled.

I sent this pic to Ken but will post it here to show what I pull with; 350G 1st. under 5,000lbs,
SM 1st. under 6,000lbs, 400G 1st. under 7,000lbs, 600D 1st. under 8,000lbs, 650D 2nd. under 10,000lbs.

John

[Terry]

Mb.Cat, your tractors look like serious contenders at any antique tractor pull.