Low compression 340 VS high compression...

Over the Spring of this year, I built a 1990 roller 360 alongside FABO member RBConvert who built a 5.9/408.
The roller is going to go into this car:

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This Dart has a late 70s 360 that runs fine but I'd like to use it in this car:

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I had this idea....build this 340 and use the black Dart as a mule to break in the cam, then put some miles on it until I know the cam survived. Then pull the 340 and install the roller 360 which will stay.

We're not talkin about 360s so we're not talkin about KB107s. We're talkin about GREG'S 340 and the pistons he has, so your whole post is completely, totally and irrefutably irrelevant. You just posted to see yourself babble. "When I did this", "When I did that". Here's a clue, sparky. THIS AIN'T ABOUT YOU. So STFU.
RRR thank you for commenting on the way that members respond to posts. I believe that I am guilty of responding subjectively as well.

Being a "barnyard-builder" on a budget, it becomes easy for me to place comments into "my subjective reality" and miss the point at hand:" We're talkin about GREG'S 340 and the pistons he has."

In my case, the only weighted experience I have to offer the group comes from the projects that have worked in my favor, and the hard lessons learned from stretching my reality (a combinations of parts) beyond their intended application.

In the end, I have learned engine dynamics from both those I appreciate and those who "push the envelope" of my patience. It's a privilege to have the commentary of other gear heads at ones disposal.