IM surprised by Richard Holdeners 360 Magnum camshaft swap.......

Well, there is also the MP crate engine to also throw out in the mix which is a stock long block, add in the cam, intake, 750 cfm carb and 1.3/4 headers, which are smaller than what Richard used @ 1-7/8, and the MP offering made 380hp as listed by MP but has been routinely seen on a dyno @ 400hp or better.

Considering that MP Hyd. roller cam was missing compression and a decent head to work well, it did well and still is considered a small cam.