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I don't think you will be disappointed. I cant tell the difference between the 450 and the 550 and of course the 550 has a little better margin of strength built in. Good luck. The V-10 is a great engine.

Very good advice above. We make sure all the propane bottles are full before winter. I do not personally own a 450 but have driven the CRAP out of a bunch of 450's and 550's. All were v-10s and most were automatics. We work the hell out of them. The 550's carry five hundred gallons of...