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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: Nov 2008 Posts: 137 Shop Shark | | Shop Shark Joined: Nov 2008 Posts: 137 | Heads (IMHO) are the best money spent for adding power to a SBC. After doing mucho research I opted for Chevy Vortec heads. Alum heads are more expensive and unless you are shaving tenths off at the dragstrip, really not worth the expenditure. Vortecs will get you into the 9.70 compression and still be pump gas freindly depending on your cam. I would recommend a Crane cam.
These heads require a Vortec specific manifold, I recommend an Edlebrock RPM Airgap or the Chinese knock off. A Holley 650cfm for the 350, and a 750 for a 383. You will also need centerbolt valve covers. All of your accessories will bolt right up Alternator, power steering pump. You will also need self aligning rocker arms Roller or stamped steel. Your original pushrods and lifters will work. If you go with 1.6 ratio rocker arms be sure and check pushrod length and valve to piston clearance. A regular HEI or orginal dizzy works fine. Exhaust system will bolt right up.
If you are running a Cam of 470 lift or higher you will need to upgrade the springs. Scoggins Dickey sells a set with spring upgrade.
I have built two engines with these heads and what a huge difference they make. | | | | | Joined: Apr 2008 Posts: 17 New Guy | | New Guy Joined: Apr 2008 Posts: 17 | I have an old '86 305 that I just installed the Chev. vortec heads, a low end Crane cam, Holley 650, Performer intake, HEI. From all the advice I got, looks as if this is a good setup.
I have an old '70 Monte Carlo front clip on my '49. Do you have any experience with headers.? Sanderson makes nice block huggesr, but I'm not sure which model will fit.
I sure do want to crank it up and see what's weak behind the motor....lol | | | | | Joined: Nov 2008 Posts: 137 Shop Shark | | Shop Shark Joined: Nov 2008 Posts: 137 | No Experiece with headers, but have heard 100% positve about Sandersons, Your combo sounds good. | | |
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