401 with 727

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   I just purchased a 1974 401 with a 727 transmission attached. These came out of a 1974 IH 2 wheel drive truck sitting in a barn since 1981. Farm truck with 33,000 actual miles on it. 
The engine is stuck so I'm soaking it in marvel mystery oil to try to free it up. 

Trying to decide what to do with the transmission, with that low of miles on it I'm thinking of just changing the filter and fluids. I don't have a vehicle to put these in at this point, however the 68 Ambassador 343 engine and m11 transmission are being rebuilt and are out of it so other than needing a driveshaft I could test them out in it. 

what I'm wondering is if I can free up the engine should I start it and run it as is and test the transmission at the same time. 

 It has a two barrel motor craft carb so id pull the intake and install an aluminum intake and four barrel carb so I could check lifters and cam at that point. Ill try to get a bore scope to look into the cylinders to check for rust and see valves.  

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myrambler Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Nut Joined: Oct/10/2012 Location: Cedar Rapids,IA Status: Offline Points: 298	Post Options Post Reply Quote myrambler Report Post Thanks(0) Quote Reply Topic: 401 with 727 Posted: Mar/13/2018 at 9:24pm
	I just purchased a 1974 401 with a 727 transmission attached. These came out of a 1974 IH 2 wheel drive truck sitting in a barn since 1981. Farm truck with 33,000 actual miles on it. The engine is stuck so I'm soaking it in marvel mystery oil to try to free it up. Trying to decide what to do with the transmission, with that low of miles on it I'm thinking of just changing the filter and fluids. I don't have a vehicle to put these in at this point, however the 68 Ambassador 343 engine and m11 transmission are being rebuilt and are out of it so other than needing a driveshaft I could test them out in it. what I'm wondering is if I can free up the engine should I start it and run it as is and test the transmission at the same time. It has a two barrel motor craft carb so id pull the intake and install an aluminum intake and four barrel carb so I could check lifters and cam at that point. Ill try to get a bore scope to look into the cylinders to check for rust and see valves.

mixed up Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: Jun/16/2015 Location: Monroe mich Status: Offline Points: 2177	Post Options Post Reply Quote mixed up Report Post Thanks(0) Quote Reply Posted: Mar/13/2018 at 9:54pm
	it's stuck for a reason rust on he cylinder or crank I would not start it until further inspection by taking it apart as for he tran its a shot that it could be fine to run fluid and filter is a good idea
	69 amx 290 auto 65 220 290 4spd 80 ford fairmont