RE: Pull Starts
If you have a starter box and you can use it to start your car you are far better of with a bump start engine. Whether it is noticable or not you will have to agree it takes extra power to spin the shaft and the drag on the one way bearing. That is a fact whether you can tell the difference or not is debatable.
The main reasons I dont like pull starts is that they can be unreliable, OWB slipping, broken cord, broken springs. And the biggest problem is that its another place for a leak to occur. Have seen engines get dusted from sucking fine dust back in the pull start before.