What Vernon says, ….and I’ll add, …..if your hands are like shovels ( mine are ) pick up some dental pick tools ……available on certain auction sites, and that on-line shopping joint ….the ones with the little rounded heads are most helpful not to scratch, maul, or tear up a mew tire ….use them basically as tire irons ….you can use small flat blade screwdrivers, but if you’re a novice, rounded tools reduce the risk of scratching delicate finishes…..dental pick tools ( even really nice ones ) can be had for small money …..
as Vernon says, it’s pretty easy peasy on your Allegheny, some engines more difficult than others,…..take apart the bare minimum to install, take out only the rod bolt on that wheel, slightly ….and I do mean slighty!!…lift up on the rod to scoot the new tire under,…..no need to do a whole tear down of rods and linkages
Pat