What cam to use in a 318

How many 50 and 55 degree valve jobs have you tested?

It can’t be many or you’d know that lift doesn’t make a pinch of **** difference in what seat angle you use.

I know you read that and heard it, but it ain’t true.

Anything less than a 45 degree seat is losing power.
You are correct that I have not tested. But I follow David Vizard and he has probably forgotten more **** than you ever shovelled up in the back yard.
You want to argue, go argue with DV!
I knew that comment on using 40° seats would give somebody a wood, and I did make comment on the difference. I guess you got your wood before reading that far.