Originally Posted by
rumrumm
I like the Magnum cam line, and I ran a 270 Magnum in a 327 some years ago and really liked it. The one thing you have to check is the DCR. A Magnum cam will allow you a little more static compression than an XE cam because the intake valve closes later. To give you an example, when I was choosing a cam for my 383, I was looking at the XE-274, but with 10.6:1 static compression, it pushed the DCR to 8.64. But with the 280 Magnum, the DCR was 8.44 which is acceptable for aluminum heads and 91 octane. Because you want to stay under 8.0 DCR with iron heads. Your best bet is the XE-274 or the Magnum 280 or something comparable from Crane, Crower, or Lunati. Because you have a 4-speed, you can go bigger on the cam and still have decent street manners. I don't think either of these cams would be good with an automatic transmission.