Why did nhra change the cam and valve spring rule in 1985?

[SSDiv6]

Originally Posted by X-TECH MAN

Might as well build a Super Stocker. Roller lifters cost less, roller rockers are less prone to breakage, Your going to sling the snot out of the engine with the rules the way they are so use better stronger parts and the heads and intakes are ported anyway and probably cost less from not having to hide what you do to them......lol.

Under your premise, let's move the current Stockers to Super Stock, then bring back Modified Eliminator and move all current Super Stockers and finally bring back Pure Stock again. LOL!!!