My uncle had like 50 old Corvette Magazines that he gave me a while ago. I was going through them yesterday and came across something realy interesting that I hadn't known before. The artical was pretty long so I just kind of sumed it up. From an all out performance point of view, many Corvette enthusiasts would have like to seen the 1970 LS7 Corvette. And what make the LS7 Corvette even more exasperating to enthusiasts is that it came so close to making it into production; it was even listed in the 1970 line-up. No 1970 LS-7 Vettes were ever sold despite the existence of at least 1 prototype. An LS-7 Vette was even tested in the March 1970 issue of Sports Car Graphic. But for whatever reason Chevy got cold feet over releasing what would have been the highest-horsepower Corvette ever cataloged. Various reasons have been offered for the demise of the LS7 project; concerns about releasing such a powerful car the public, along with internal GM politics against cars with excessive horsepower; the anticipated drop in compression ratios for 1971; or possibly GMÂs then-current Âde-proliferationÂ program aimed to reduce the number of option packages that complicated production and raised costs. Any or all of these reasons may have been valid. In an case the LS7 would have been a stormer. Essentially a ZL1 427 with the 454Âs added cubic inches and cast iron block. The LS7 was variously rated at 460 to 465hp at 5200rpm, but that figure is for those who still believe in the Tooth Fairy. A Chevrolet Engineer was quoted to say that it had closer to an output of 490-500hp at 6000rpm running on 103 octane gas with the ZL1 cam, 12.1:1 compression and cast iron exhaust manifolds. With 2-inch tube headers, another estimated 100hp would be possible, making the LS7 Âthe most powerful production engine to ever come out of DetroitÂ --- Sorry, no pics. There were no pics of an actual 1970 LS7. Some guy made a replica of the engine and put it into a red 1970 Corvette w/ a ZL1 style hood.