That was funny. But yeah, strokers tend to wear out faster than non stroked engines. The biggest problem with the 302 blocks is the crap rod ratio. It's already not that great on the 302(for a short stroke engine that is), but the short deck height of the 302 means that stroking one will rapidly turn the rod ratio to crap. You end up with more piston side loading, which leads to the faster wear. Good pistons/rings and cylinder wall prep will reduce that and still give you decent engine life, just not as long as if the stroke was shorter. The big problem though is that the bad rod ratio increases stress on the block, which is the weak point in a 302 based engine. It's easier to break a block with a 347 than a 331 or a 302. That being said, it's mostly in the parts quality and the tune that determines engine life. A poorly built and poorly tuned 302 won't last half as long as a well built and well tuned 347. Stroking is a cheap and easy way to get power from a small block and have it streetable though.

Also, the GT40X heads are ok, but you'd be better off with a better head, Edelbrock RPMs, AFR 165's, Dart 170s etc. The GT40X heads have mediocre flow for their port size, they'll make decent power, but on a short stroke engine like a 289, you're gonna want the highest flowing smallest port head you can get, since the low piston velocity won't generate as high a port velocity, so a bigger port will result in lost power