Main thing is to KEEP all the bearing SHIMS with each rod or Main bolt..
Take the crank out and you can drive the Sleeves out with a mallet and a block of wood..
be SURE to CLEAN the block (inside AND out) and scrub the Sleeve locations well...
Setting the Bearing Clearances are what you MUST take your time with and be sure you know what you are doing..
A WD-45 crank is always a great BIG PLUS, if you can find a good one..makes much more power..and install a 9-spring engine clutch and pressure-plate.. Do this and she will carry the front-end in 2nd gear while plowing any time ya want..!!