I am interested how this ends up. I would think you will need a little weight forward to counteract the motor, as far as offset I would start at about 10. Keep us posted
only way to really know is to run it, back then some had limiters at all different RPMs, I have found some had none. Do you know if it is a digital or analog box?
this is why I went back to a 225pro max and got rid of my 280, in my opinion the piston and ring choice for the hi perf motors is nothing but junk, lets face it they are both built by wiseco, I am not a fan of any of their parts.