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  1. 1967 firebird rear end question

    Transmission - Rearend
    i have a gm 7.5 rear differential in my 1967 firebird and it has 2.73 gears and was wondering should i change the gears to better ones or change my whole rear differential to a 8.2 or 8.5 differential? thank you
  2. Unidentified gm valve covers!!

    Hotrodding Basics
    Looking for anyone who may know something about these valve covers i bought. I bought srveral sets from a guy i work with, i have identified all except these. He said they where 58 vette fuel injected valve covers. Punch that into ye ole google and i am bombarted with 9 and 7 fins... These are 5...
  3. How many blades does the best GM mechanical fan have? I got one with 7 yesterday..

    Hotrodding Basics
    I took one with 5 blades off, and plan on putting the 7 blade on.... any benefit here?
  4. Worst Domestic Engines

    Hotrodders' Lounge
    Hi All, I've noticed that the Chevy 305 and 307 engines often get dogged for, well... beings dogs. Good for fuel economy and emissions, but no out-of-the-box performance. And even when performance upgrades are considered, the cost is always overshadowed by the cost to buildup a 350 with more...
  5. The Throwback Corner

    Hotrodders' Lounge
    So, I happened to be flipping through a recent issue of "Cars" magazine (June 1966) and ran across something I thought might interest some of the forum members. (See image below). The issue also covers John Smysers 850 ci, 2400 horsepower, 2-engine Toronado, a preview of what was once known as...
  6. GM Starters: Repair / Rebuild Information

    Hotrodding Basics
    I found this page on repairing GM marine starters. Although it is a marine application (it has the flame shield, which automotive starters do not), I would think that the overall process of taking apart and rebuilding the marine starter should be similar to the automotive version. "How To...