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#1061697 - 04/29/19 09:59 PM Trick Flow Super 23 175 Heads  
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Nick's87Aero Offline
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Nick's87Aero  Offline
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Queens, NY
Has any one used, and/or had any experience with, Trick Flow Specialties Super 23 175 cylinder heads on their L69 305? Thank you in advance!

#1061703 - 04/30/19 05:29 PM Re: Trick Flow Super 23 175 Heads [Re: Nick's87Aero]  
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Travis Jones Offline
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Travis Jones  Offline
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Originally Posted by Nick's87Aero
Has any one used, and/or had any experience with, Trick Flow Specialties Super 23 175 cylinder heads on their L69 305? Thank you in advance!


They would certainly be a flow upgrade over the stockers, but I would caution spending that much money trying to perk up a 305. Investing on heads that would work well on a 350 or 383 down the road is a better path, assuming you have the hotrod bug and want to upgrade and improve the car continually.


86 SS 6.0L LQ4, TBSS GEN IV intake, 92mm TB, 30lb injectors, Summit Stage 3 NA Cam, Stainless long tube headers, Stainless 3in exhaust, Microsquirt ECU, FABbot AR5 5-speed, Torsen LSD, QA1 Lvl 3 Suspension Kit, UMI Front & Rear Braces. Check out my build blog on Summit Racing's OnAll Cylinders https://www.onallcylinders.com/author/travis-jones/
#1061838 - 05/11/19 01:01 AM Re: Trick Flow Super 23 175 Heads [Re: Travis Jones]  
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BadSS Offline
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BadSS  Offline
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Pearl, MS, 39208
Originally Posted by thepezking639
They would certainly be a flow upgrade over the stockers, but I would caution spending that much money trying to perk up a 305. Investing on heads that would work well on a 350 or 383 down the road is a better path, assuming you have the hotrod bug and want to upgrade and improve the car continually.


Totally agree. The problem is there's not many practical choices for true performance head that fits the 305 that would be decent direct swap atop a 355 or 383. CNC ported L98 heads used to be about the only option but are expensive and out of the box AFR heads flow better for less money..

I'm not a 305 hater, I think bolting on a set of Vortec heads (Vortec intake needed) a good exhaust and throwing in a good cam can do wonders for the 305. That's a good bang for the buck investment for a rather significant improvement in performance.

Here's a link to a 305 with Vortec heads and relatively mild flat tappet hydraulic making 325HP
https://www.hotrod.com/articles/ccrp-9903-305-chevy-small-block-engine-build/

If that won't do it for you, you could spend a lot more money on the TFG 175s and a bigger hydraulic roller and make 360HP

http://www.superchevy.com/how-to/project-cars/sucp-1007-305-small-block-engine-build

I'd tend to go with the Vortecs on the 305 and sell them and get a set of 195 or 210 AFRs if I wanted to move up to a 355 or 383 later. Getting the TFS 175s for the 305 and having bigger valves installed along with getting them fully ported is an option, but you'll have well over $2200 in total and probably flow less than the AFRs.


Original owner of 1985 SS black hardtop w/gray interior. Frame-on restoration - 406 sleeper w/ heavily ported FIRST TPI. However the 1.875" headers, 3.5" duals, TH400, Ford 9", notched frame, and 10-point cage w/swing-out bars might tip you off it's not a lil' ole 305 TPI. Other mods: 2" drop, 18" wheels, f/r disk brakes, and custom stereo system.

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