Serious 340 build into 361 HiRPM Screamer

One shouldn't get too "rpm happy". Valve float starts before you can actually feel it, like before the car noses over. It's like literally taking a hammer to your valve train.

A 360 isn't a common high rpm combo, I ran a W-2 360/727 in a 2,800 lb 2x3 chassis car with a 10.22/131 mph best, Started out shifting at 7200. Tried 6800 and it ran just as fast. Each combo is different, but that's my experience. More isn't always better/faster.

Totally agree-A stable, happy and RELIABLE valvetrain @ 7000+ is not all that common or easy. Most 340's I've tested are pretty much done @ 5900-6000--Will they rev to 7000 rpm if asked to--Yes most of the time. Will they actually keep you pinned in the seat all the way to 7000-7500? Not in my experience they won't. Thanks for the comments. J.Rob