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ryanv70c10 · 12-03-2016, 01:16 AM

You're going to need at least a 230 cc head to get it to really breathe. My 406 makes right around 600 with a 220 head, solid roller and 10.4 compression. Runs 10.50's in my 64 Nova.

While I drive it to the track and cruise it I wouldn't want it to be a daily driver. The cam really makes the engine roudy. It doesn't smooth out until about 2000 rpm. I also have an 8" converter.

12-03-2016, 01:16 AM	#24
ryanv70c10 Registered User Join Date: Feb 2016 Location: San Mateo Posts: 199	Re: Best headand cam combo for 421 SBC You're going to need at least a 230 cc head to get it to really breathe. My 406 makes right around 600 with a 220 head, solid roller and 10.4 compression. Runs 10.50's in my 64 Nova. While I drive it to the track and cruise it I wouldn't want it to be a daily driver. The cam really makes the engine roudy. It doesn't smooth out until about 2000 rpm. I also have an 8" converter.