Way back, 15 years ago now when I worked in a parts store, TRW cams had the prefix TM on every one of their cams. IIRC, small block Chevy was a TM274, can't remmeber the Ford number but I still remember the Chevy one.
I agree with the other poster, the HEI is big and ugly, why put something like that where people can see it? A MSD is a better alternative form a price standpoint, or use something made by MSD or even that new Crane unit.
Dude...it cleans up under the hood and gives you better performance and reliability. Unless you are going for concours....I wouldn't sweat it. Anybody who says they look cheap don't know what they are talking about....and they definitely haven't bought one.
I bought a DUI but never used it. The problem I had was I needed a 14" drop base air cleaner to keep the stock hood. With the DUI, you have to use a smaller air cleaner, which meant I couldn't have a drop base. I still have it, brand new, in the box.
I looked pretty hard for a smaller dropbase air cleaner and couldn't find anything. I really did want to use the DUI. I ended up with a Crane small cap distributer and box. What I like about it, is that both advance curves are externally adjustable.