Great info, thanks for the reply
The CNC porting I referred to is Dave at KG Engines in OH, I spoke with him and seemed very knowledgeable offered up a complete CNC service for $750. A lot less expensive $ than a new set of aluminum heads.
He was not concerned that they had been acid washed. The X heads I have are currently on the car and just freshened by Brad VanLant in 2018 maybe 5000 miles on them and the rest of engine Most likely a touch would be a good idea while they are off the engine.
I do not currently have an MP 528, I would like to find a cam that is close to the MP528 maybe in a solid roller.
So the quest continues for the perfect cam. Ha LOL
Any suggestions would again be valued