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1955-57 Small Block LS1 Installation

In 1955, the all-new overhead valve 265 ci small block Chevy was all the rage and really put Chevrolet on the map. The small block Chevy soon replaced the flathead Ford as "the" hot-rodders engine. Ever since then, car-guys have been pulling the stock engines out of their cars and installing larger, more powerful engines. Next to the 1932 Henry, the Tri-Five Chevy's have become the most modified car on the planet.

In the '60s and '70s it was a hot 327 or 350 small block. In the 1980s, it was time to shoehorn in a big block Chevy. Now with a few more years of technology behind us, it's time to install an engine that requires no maintenance, is super lightweight, puts out unbelievable horsepower and torque, yet gives you a car you can just jump in, hit the key and go. No pumping the gas pedal, adjusting the choke, no setting the idle air screws, no setting the points (what are they?). It's now time for a reliable engine with electronic fuel injection and a transmission that you just stick in gear and go.

In the last few years, the LS1 engines used in Chevy F-body cars (Camaro and Firebird) and Corvettes have become readily available at all salvage yards. It's time to get our hands on one of these engines and drop it into a Classic. The LS1 engine is part of the GM LS series which includes LS1, LS2, and LS6 small blocks. This installation procedure will work for all LS1, 2, and 6 series engines. In this article, when we refer to the LS1, we are referring to the LS2 and LS6 as well.

Tools Needed:

  • Electric Drill w/ 3/8" Drill Bit
  • 10 Millimeter Wrench
  • 9/16" Wrench
  • 7 Millimeter Allen Wrench
  • 14 Millimeter Wrench

Time Frame: 6 Hours