Straight Cut Timing Gears?

I've got a set of Straight cut timing gears for my A Banger,
they've been made up in mild steel, what do you reckon, do they need to be surface hardened before use??

Outback

 

Would not be a bad idea to have them case hardend.

 

wouldn't hurt...but you can always let us know the outcome of running non-hardend gears.

how old are these, and where did you get them.

i run a set of original straight cuts on my T, i just like the grinding sound they make...more racket is always a good thing

 

The gears that i've got are brand new, I think they've been laser cut, I got them in a box full of bits from a grey beard over here, I was thinkin hard casing would be a good idea, however I know that other gears are brass, or even fibre, so they should be hard enough, brass does have a lube quality about it..

Outback