speedmaster 2.02 valve heads on a 318

Yes; My brother's Scamp uses 318 mounts on his 340 and the 360 that used to be in there before...I think there were just washers on the ears to offset it. Lemme see if I can find the thread(s) that discuss this...it's been cussed and discussed on here numerous times. With your fab experience it should be a non-issue