So I just got a 78 1650 from my grandpa, been sitting for 5+ years, has a 3 pt hitch, plow, blade, disc and mower deck... After some fresh gas it fired right up and runs good, but dies when u engage the the blade. also one of the rear tires has a hole in the side, and after a plug still leaks. Its a 23/10.50x12, I've looked around locally and the tire is around $100... Anybody know where to get one cheaper? Can I use an inner tube to get me by for a while?