built 340

This article was written in 2001 but they took a bone stock 1970 340 and added some goodies one at a time. They wound up with 355 HP from just bolt on goodies. Made over 400 with a cam change. Impressive!

http://www.hotrod.com/how-to/engine/mopp-0102-1970-340-high-performance-mill-dyno/