We are shopping around for our first MH, looking at 1980s 26-30' Class C's. About 90% of the ones I've seen for sale (online and IRL) are built on the Ford chassis with the 460 motor. When looking at these 20-year old MH's, is there anything mechanically about used 460's that I should watch out for? Some eBay ad (posted by an RV dealer, not a private seller) stated something like "this motor has an obvious donut gasket leak, which all of these old 460's seem to"... is that true? Also, is general maintenance on these as easy as any Ford truck? I'm used to doing oil changes, fluid drain-n-fills, etc. on my own, to avoid costly trips to the stealership ... but I don't want to get in over my head either. Any words of wisdom on buying/owning/maintaining the Ford 360 are much appreciated!