Not Ranked
Pete--
When I was shopping for my Superformance, the dealer allowed me to try both a 351 and 460 version. Though I loved the torque and rumble from the big block, it handled like a really fast Buick Roadmaster (understeer, understeer, understeer).
For me the small block was the only choice. And you can always build one that has the performance qualities of a big block w/o the weight penalty. If you intend to do track time, the small block is simply the way to go IMO. However, if you're after the authentic look, a big block will fill that engine bay like no Windsor.
Reliabilitymaintainance between the two is largely a matter of how crazy (and well built) your particular motor is. I'm no builder myself, but I've never heard of durability issues on either block, provided you use the right bits.
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