First off let me say thanks for all the information I have found on here that has assisted me in getting as far as I have with my 86. I have read a lot of forums and found most if not all information I need for this project. I bought my truck almost a year ago and so far I've replaced the cooling system, fuel tank selector valve and thank to the previous owner the starter and battery thanks to the aftermarket push button start wires fusing. I made another post when all the trouble started and kinda just parked it and went on with my new job and car I bought out of frustration. Well now I have the motor out and the reason for that is oil pan gasket and a few of my valves are chipped on the top or pitted. I've already purchased the newer style getting away from the saddle rocker arm mount which is why I parked it in the first place. Tang wore off started a tap and then a misfire I'm assuming because the exhaust valve was able to stay open. I'm just here looking for advice on what else I should replace or do while I have it apart and on a budget. Going with arp studs and new gaskets. I'm an aircraft mechanic and this is probably the most I've torn down and engine and first diesel on top of that. Any tips would be appreciated.