Bumper help question 66 Dart

Retroron, I understand that and I just got thru a bad deal on here with a set of heads that I bought where I was forced to do that to one of our members. I am kinda screwed here because if I piss him off I might get a shitty second bumper since I cant see it before hand. I'm gonna leave this one ride for now and see how it all works out. I will run into them at a show later this year and deal with it then. But I love your line on what to say!!! Lol
Rod