Modifying vortec heads
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Joined: Feb 2015
Posts: 265
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From: Cambridge City, IN
Car: 1991 RS
Engine: 355
Transmission: TH350
Axle/Gears: 4.11
Modifying vortec heads
I just picked up a set of vortec heads and they just so happened to not be cracked! So now I'm looking to swap them onto my sbc. But my cam had to much lift for the heads. For everyone that has used the comp tool, what all do I need to make this possible to have more lift?
Joined: Jan 2005
Posts: 10,405
Likes: 492
From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Modifying vortec heads
I just picked up a set of vortec heads and they just so happened to not be cracked! So now I'm looking to swap them onto my sbc. But my cam had to much lift for the heads. For everyone that has used the comp tool, what all do I need to make this possible to have more lift?
0.050" offset locks
Behive springs.
Be sure to measure but if you have the valve seals fully seated this should give you just under 0.600" retainer to seal clearance and allow you to run a 0.550" lift cam.
Joined: Sep 2005
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Re: Modifying vortec heads
Won't fit your heads.
The retainers, keepers, seal, and guides are for LS valves, which are different from SBC ones..
The retainers, keepers, seal, and guides are for LS valves, which are different from SBC ones..
Thread Starter
Member

Joined: Feb 2015
Posts: 265
Likes: 12
From: Cambridge City, IN
Car: 1991 RS
Engine: 355
Transmission: TH350
Axle/Gears: 4.11
Re: Modifying vortec heads
Mostly because it would be almost $300 just for springs, retainers, and deals if I went the beehive route. I would rather spend less than that and be able to use cheap springs
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Joined: Jan 2005
Posts: 10,405
Likes: 492
From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Modifying vortec heads
You can get 787 retainers and GM beehives for $200 or less and 0.050 offset valve lock keepers are cheap.
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