we do in frame overhauls at work,but diesels have liners that we change,you can do it in car,just have to hone cylinders but have to check your ring gap
I have a 230/400 block I brought,didnt know #5 and 6 hole was cracked till after I hone it,made me real sick,thought it was junk,but if I could sleeve it I would be happy,really want to save it
how old is the spring,what make,is it a double or single stock spring,will the valve move up or down depends if you bent the valve,can put a spring on it on the car,or take the head off
i run 15-40 delvac in my truck and race car,being a truck mechanic,my dodge truck has 250.000 on it,never leaks,never uses oill between changes,doesnt smoke,my 5.9 never has been apart