my restoration guy proposed a modifiKation to my engine and i would like to hear your opinion, because i'm not familiar with that modification.
He said its a standard modification that Shelby did himself.
It's quite hard to translate it from german to english. If you have trouble understanding it: Please let me know.
Here's what he wrote: "We will do some fine machining to the valve seats and we will do some adjustments to the transition from the chambers to the manifolds.
I would give the seats (currently at 45 degrees) a 15 degree refraction angle and i would give a a back cut to the valves."
He told me that it would cost around 500$ to have it done.
What do you guys think: Is that something that can be done without lowering the Kar's value?
Looking forward to your replies.