You will not have a problem running a domed piston with that head. The term low compression is used to described a head that is designed to burn kero or distilate fuels. You can mill the head down to increase compression but you will need to take it down quite a bit to get even get close to a stock high compression head. The diffrenence in compression is, the low compression will have around 90 psi while the high compression gas will have around 130psi. As D said check your tag for a suffix it could have been ordered like that from factory. If your not planning on pulling or heavy tillage then that head will be fine. What are you planning on doing with that Super M?
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Today's Featured Article - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
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