I think Patrick needs to speak with Donnie Quinn about whether or not the 302 head flows the same as the other 318 stuff. Much of the "advantage" of the Magnum heads is due to the 1.6 rocker ratio. Let's look at this another way. Find a set of 315 castings (273) have a decent valve job and install them. The port velocity will more than make up for the volume increase of the magnum. Anyone out there got a 318 with magnums in a 74 - 76 A body? What's your ET and what kind of fuel do you have to run?

Just built a .030 over 318 with Sealed Power (el cheapo) pistons, I used the .411 - .399 stock eliminator cam out of our U/SA car, a set of 315 casting heads, a 273 HP cast iron intake, and a quick fuel 650 carb. ET 12.28 on regular pump gas. Granted it's got some gear, but that 75 Dart is HEAVY....

What I am saying is, there are several routes to the same destination, take the path with the least resistance. Oh, by the way, the valves are STOCK DIAMETER 273 jobs....

Peace, Rev. Mopar (Class of 65, 32 time National Record holder in U/SA)