I know this is a tough question but, the mag hemi crossrams don't have a date code on them like the aluminum ones do. Is there a way to tell which ones would be proper on a 65 and which ones would have been made for a 68? Of course they sold these over-the-counter for a long time also. The photos are of 2 different intakes. The castings tags are slightly different. There are also 2 tags each on the side and I sent a photo of the best one. I know it's a tough question but I thought i'd ask. Thanks.