I got my cnc heads bolted up to my 340 earlier this year and have a couple hundred miles on my car. Bolted them up right out of the box and they have been great. I’m not sure if I have anymore power than I did before though? I know as much about tuning as a fat kid knows about dieting… lol
I’ll be getting another set for my spare 340 block as well. Going to get some of their rockers too!
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