MF40 industrial S/N 9A207276, Need some help here

I just bought this tractor at a reasonable price. It has a few issues. I have had a real problem getting information. It's like there is a black hole when it comes to usable on parts. what I mean is even going through a Massey dealer they just say they have no record to identify this tractor. This makes it hard to insure I am buying the right parts. I t has a Perkins 152UA S/N 131161D 3 cyl diesel. Some of my docs call it a MF40B but The original decal on the hood just says MF40. There is another data plate above the STD one on the instrument panel that has 4760 stamped on it. I do not wish to purchase Manuals unless I can be sure if they apply. I am hoping someone can help me out here. My main issue is with the cyl head. Compression gases pressurizing the cooling system, I hope it is just the head gasket. I bought a new gasket but do not know the torque for the head bolts. Back to the issue of applicable Manuals. I know it's a great machine just need to give it some much needed maintenance.
This tractor has a MF32 Loader on it and is equipped for a 3 point hitch. It has wet brakes, Std clutched xmsn with L/H lever for FWD/REV. Any info would be much appreciated.

head bolt torque is 60 ft. pounds
if you go to the link agro I supplied you can scroll down past the dealer log on and click were it
says guest user click the box that says view books
on the next page type 40 into model and in the all brand box change it for Massey
if you want to check parts for the loader put 32 in model as its listed as a seperate unit from the
base tractor as they were add ones
this will at least get you correct part numbers
if you click on all forums at the top of the page here on YT scroll down to the Massey page
there you'll find a great bunch dedicated to masseys
BTW this site sells parts for MF 40's too
agro

Per "Massey Tractor Data" the 40 has a 3 cyl. and 40B is 4 cyl. diesel engine.

It's not a 40b. Those have a 4cyl. Put some
pics on here.