Bill,I think my101 Super will be a money pit too..I drained 10 gallons of water out of the rear end and 3 gallons of water from the engine oil pan...I do have a nice 230 Chrysler 6 engine that I bought for $125..Its on a trailer and was powering a welder...
As you said it does have the engine side panels but its missing the side panels under the gas tank..A man in Kansas makes all of these for a small fee..
I'm not a Massey expert but heres how I think it goes on the 101's...
1938-39 Massey 101 Twin Power had a 201 cube flathead 6 Chrysler..
1940-42 Massey 101 Super had a 217 cubic inch flathead 6 Chrysler..
1943-46 Massey 101 Senior had a 226 cubic inch flathead 6 Continental..
Then came the 44-6 with the Continental 6 engine..
I got lucky and recently bought "The Big Book Of Massey Tractors" by Pripps for less than $20 at a flea market..It goes for $75 on ebay and $90 and up on Amazon..It has lots of nice pictures and info..
Heres a picture of my friends money pit 101 Super..He has some over $3,000 in it and still no side sheilds..It was torn down to the last nut and bolt..He also has a couple of 101 Seniors..He totally restored a 101 Senior several years ago and got $2500 for it on a sale..