Usually, front tires would've been a notch down in size from the rear if there was a size difference. However, based on the tires that I have available and not wanting to spend more tire money, would there be any technical problem with putting 9.00x20's on the front and 8.25x20's on the rear? When I got the truck it had worn out 9.00x20's all the way around. This is on a 1958 Chevy Spartan 80 2.5 ton (single rear axle). It would be nice to hear your feedback on this. Thanks!