Simple way is to turn a bar to fit nicely inside the bore with a ledge approx the od of bushing hit with sledge hammer drive bushings out use bar to drive new bushings in
Slightly more complicated buy a 20 ton hollow cylinder they are cheap at temco ebay amazon whip up some pulling plates and threaded rod to fit bushing nicely and pull them out reverse operation to pull them in
You can calculate the shrinkage from freezing in your machinery handbook you will see that a bushing that small od will not fall in like a 4 inch one every bit helps though even the deep freeze They wont fight that bad its pretty simple stuff
You may find the tilt cylinders have no bushings from the factory and need to be bored to accept them when i did the 279 I added seals also on the front end
Slightly more complicated buy a 20 ton hollow cylinder they are cheap at temco ebay amazon whip up some pulling plates and threaded rod to fit bushing nicely and pull them out reverse operation to pull them in
You can calculate the shrinkage from freezing in your machinery handbook you will see that a bushing that small od will not fall in like a 4 inch one every bit helps though even the deep freeze They wont fight that bad its pretty simple stuff
You may find the tilt cylinders have no bushings from the factory and need to be bored to accept them when i did the 279 I added seals also on the front end