It's not relevant any more because the service in no longer offered. But because you asked, an example or two. Edelbrock RPM or standard Stealth heads to 340 cfm were $1,750. Factory iron 906 heads to 340 cfm were $5,100.
Our heads were designed for a very limited class of competition. There were always heads that were "better" but my son and I were trying to go where others thought it was impossible.
"Dad, let's beat the aftermarket aluminum heads with factory iron!"
Had it said behind our backs, "Nobody can make the kind of power he claims he can with Edelbrock RPM heads!" Well we did it, and more, on Comp Cams dyno.
You see, we were out of touch with reality. I was stupid and didn't realize we had the knowledge and the skill, but never had the money or facilities to compete with the rest of the world. Now, some months I pay the electric bill in the shop with my Social Security.
But, hey, I'm still overweight, so it can't be too bad, eh?
