I have always heard there is some debate over whether or not full pressure 235’s came from the factory in 53 1/2T trucks built in Canada. This was the factory engine in my truck and it was stuck solid when I bought it in 2006 and I have left it untouched since I pulled it and put it on a stand after filling the cylinders with marvel mystery oil. Last night I pulled the plugs and it turns like it should, a candidate for rebuild for sure!!
Thanks once again
Paul
