I've been doing searches on the HAMB and the web on some history of the tunnel ram intake. Here's some of what I found. Anybody else can chime in and post what they know about tunnel rams. I'll ask my question at the bottom of this post. Here's a pic I took at the Autorama of what I think is the clone of the Ram Chargers Plymouth. From the tunnel ram Vs. Single quad article on Car Craft's web page http://www.carcraft.com/techarticles/0304_ram/ "Tunnel-ram intake manifolds made their first known dragstrip appearance on the legendary Ram Chargers "High and Mighty" '49 Plymouth in 1959. A group of hobbyists consisting largely of Chrysler engineers, the Ram Chargers created a new style of manifold by mounting a pair of Carter AFB carburetors over a common plenum and runners made from industrial-grade rubber hose. Thus the first tunnel-ram was born, attached to a 354-inch Hemi. Popular in the '60s and '70s with car crafters, the tunnel-ram enjoyed quite a following until the advent of modern, technologically advanced single four-barrel intakes that offered easier packaging and the simplicity of tuning one carburetor. In racing classes with no limitations on carburetion, tunnel-rams live on in high-tech sheetmetal and carbon-fiber form. In the ultimate expression of normally aspirated performance, NHRA Pro Stockers are exclusively equipped with tunnel-ram-style induction. But, like most performance components, tunnel-rams are combination specific; we don't recommend slapping one on a 300-inch 8:1 compression engine." My question is, when was the first commercially available tunnel ram for SBC made and who made 'em? I'm trying to figure out if a HAMB correct tunnel rammed SBC can be built or if its a later permutation. I wanna eventually replace the common 350/350 that I have in my '46 with something less humdrum once I work the bugs out. 4sp, multiple carbs, lumpy idle, lots shiny stuff.