I have the Magnum 280 in my 383, and for me, it is just right. In a 350, it would be a little lumpier than I like personally, but that's a matter of prsonal preference. The Magnum series is often overlooked because of the popularity of the XE series, but the Magnum cams make great power and torque, and you can use them with a little more static compression than the XE cams.