May I ask what was he building for, as in the usage? Stock ? Upgraded for something other than bone stock? H0pped up?
Sounds like this guy needs a stock slant 6, even if he rv cam'd it or bought a higher lift version of a stock perf type cam.. that's a set of valve springs. Really with slant 6's the main problems or maintenance will be the crap nylon distributor gear and making sure to locate a good hardened drive oil pump..or rebuild his old with a milled plate and spring/adjust the pressure a hair higher.
Those slants don't last darn near forever because they a ton of upgrades now.. kiss method is the approach to be taken.
