My 347 stroker kit is composed of an eagle cast steel crank, eagle h-beam rods, and JE SRP pistons. The piston pin is up real close to the oil ring land but it still doesn't need a spacer to support the oil control ring. I'm not sure how long a 347 stroker is designed to last, but if your talking about 6000 rpm plus action with a big roller cam, etc then I think something that is in the realm of 50 to 60,000 miles would be better.
Typically in the .600 + lift range and revs in the 8000 rpm range, the life of the engine can be measured in 1/4 mile runs. I don't think this means catastrophic failure but rather when a measurable loss in performance can be observed.
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