C engine siezed

Looked at a Farmall C today that my brother-in-law is thinking of buying. The current owners said it quit running earlier this year and would not start again but at the time did crank. Today when we examined it discovered the engine had seized from it being outside without a cover on the exhaust manifold. The sale is pending on me getting it in running condition, so I removed the spark plugs and sprayed some PB blaster down the cylinders and will check back next week to see if the engine has freed up yet. If this does not work my next plan is to pour diesel fuel down each cylinder and let it set another week and hope for the best.

Any one else out there have any other suggestions on things that might free the engine?

BTW I am not that familiar with Farmall tractors so could someone please let me know if they are good tractors and how much horse power they are rated at.

Thanks,

BigWill

Thanks for the reply. Tried the hand crank also attempted to tow the tractor on loose gravle and let the clutch out with the transmission in gear but the engine would not budge. So at this point only time will tell.

BigWill