RE: 428 prop
Lots of choices.
8.8x9.25
8.8.9
8.8x8.75
8.75x8.25N
8.75x8.5N
8.75x9W
Probably the most common, but there are others. Fred use to run the big 9.5NN as well.
8.25N was always my favorite, but used the 8.8x9.25 as well. Just don't get it lean on the ground, needs to be burping and nearly dying before getting in the air.