Starting the old d7 with pony motor 

Yep exactly right, about 5 years later we finally got around to pulling that head off and exhaust valve hadn't been sealing for quite sometime. Ended up finding a head in better condition to re-seal.

@@willardnelson2724 i have one i think with same issue 56 D7c 17A as seized from sitting used dextron and acitone to free it and i hear valve chirp

@@willardnelson2724 mine i probably rusted seat

@@willardnelson2724 it sat about 11 years with no cover on exaust

@@wilmamcdermott3065 that's one thing we always had our stack covered and a nice tarp over engine and seat area.