Here is a couple of pictures...yes..early w2 had freeze plugs on them..later did not...picture of standard length and long valve econo heads..

and second picture shows ribs vs non rib w2...

IMG_0791.JPG100_0965.jpg
Tony

70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)