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Labor Day Putting down your wrenches or time for
MORE wrenching? 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Aug 2004 Posts: 1,067 Shop Shark | | Shop Shark Joined: Aug 2004 Posts: 1,067 | Your next best bet would probably be to get a pair of GM Vortech heads; but you may want to check with a machinist to determine how much to shave them to give the 305 a decent compression ratio. They're only about 500 something bucks and make terrific power.
Your stock cam is good for torque production if you want to keep the motor torquey. A slight boost in compression and better heads, intake and carb would make a very big difference. Also consider the best exhaust you can get to fit in your truck.
52 GMC 3/4 ton pickup
68 Big Block Vette
68 455 Firebird
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