Is it necessary to use a quiet hot cam like the Comp cam XE284H with the KB190 pistons to make it work. I guess a hot cam takes some of the compression.
But how will it affect idle.

Any advice on best cam with KB190 pistons and still having a reasonable idle.

Will there be a perceptible difference in power between the use of KB190 vs KB107

I assume KB107 pistons macth best with XE268H or similar.