Hi all,wonder if anyone could share any knowledge on this.Recently purchased a very nice cylinder head for my Super Rocket.The casting no is the correct 67-1126 as on my bike. I also noticed some other casting numbers that are different on each head. One starts with 58 the other with 57, is this the year of manufacture? The one with 58 is the one on my bike and it being a 1958 presumably is the year?
Thanks.
Martin.
