Wyreth auto rx works on stuck rings???? Hmmm never gave this truck a dose of that as the valve covers never had gunk build up an oils always nice when changing. Will try that Tom when I change Tw oil. An my RDT is a 1/2 in hose with a custom elbow straight outta the valve cover. I thought that was over kill! What size do you reccomend? It's an easy change.
me thinks you are too young to know,,but if you went and looked,,at a OLD 390 with a rdt,,it would be 7/8 dia,,and the 444 cu in,,will require at least a 1 inch.........all the way thru..the faster the engine spins,,the more VOLUMN of gasses.....