LS engines are easy to beat. We heard about an old customer with a beautiful 64 GTO inquiring about having an LS engine built when he maxed out his Butler Performance 461. I reached out to talk him off the ledge. He ended up with a maintenance friendly seven second pump gas Pontiac engine. We've seen the engine twice in seven years. The link below is a video of his car.
https://fb.watch/9zski6WQQ0/