Question:

 2010 NTPA Season General Rules item #2 –

Component chassis tractors will be allowed to run any agricultural tractor
sheet metal (1960 or newer) with any legal block. Block does not have to
be the same brand as sheet metal.
(This applies to both Super Stock and Pro Stock tractor divisions.)

Could you define what a legal block is?

Thanks.

H W

Answer:

From the current rules. Only engines considered legal to be used in Super Stock division must be available in two wheel drive farm tractors  (This applies to both OEM and Component type.)