I am not sure this is the correct forum for this topic so I may post it elsewhere as well but I have a 1988 Ford E150 Conversion Van that is rapidly approaching the 300,000 mile mark.This has the original 5.0 302 and AOD transmission.The oil was constantly changed and filters replaced.The biggest repairs I have ever had to do was replace the distributer and Alternator.The engine has and remains very dependable but is starting to develope a rod knock and has excessive valve train noise.It does not burn oil and it still starts no matter how cold or wet it gets but I do alot of traveling with this and am considering pulling the engine and rebuilding it or replacing it with a 1991 302 from a Lincoln Towncar.I have been told there is a difference between car engines and truck and have seen this mentioned in catalogs that I have been looking at for rebuild kits.Can somebody explain this to me and offer their thoughts on which of these 302's are a better engine for my Van.I have been told that the Lincoln may be a "roller"? engine and that that is the better engine but would like to see what I am told here..In either case I plan on rebuilding whatever engine I decide to use.I do alot and I mean alot of towing with this Van,I have towed everything from a fullsize International school bus to a 10 ton dump to a 1977 F250 4X4 on my trailer so any suggestions on what I may want to due while I have the engine apart would be helpful as well.Thanks