OK then, I out the horse before the cart, sorry about that.
Find out if the guy sonic check it and get the rear out if you can. Find out where the piston sits in the bore and how many cc’s the dome is.
A Purple cam is old tech that works just fine. I would not be in a hurry to change it if it fits the application of your end goal. Single pattern cams are known to make a little more down low torque.
Construct your exhaust system wisely!
