I have a 260 2v with only 46K miles on it in my 63 Fairlane. Its now running well (with help from this foum!). Is it worth keeping it, and adding the usual mods (new intake manifold, 4v carb, mild cam, ported/polished heads) or dumping it for a 289/302 and building that up? My plans are for a dependable cruiser w/ decent power (not a drag car or road racer). My biggest concern is the 5 bolt bell housing and limited options for any tranny upgrades (the car has a 2 spd Fordamatic and I'd prefer a C4). What do guys think?