Best headand cam combo for 421 SBC

[hotrod 80]

Originally Posted by ryanv70c10

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.

These numbers seem real . I have a 392 with AFR 220 , solid roller @ 13 to 1 . Mine made 648 and I run low 10's @2880.